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Last updated on June 12th, 2025

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Discounts

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A discount is the reduction in the price of a service or product. Most businesses offer discounts as a marketing technique to attract more customers, clear out stock, or encourage mass purchases. In this topic we are going to learn more about discounts, its various types and mistakes that students make and ways to avoid them.

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What is Discount in math?

In math, a discount is a reduction applied to the original price. Discount is usually expressed as a percentage of the original price. It helps in determining the final selling price of the product after the original amount is reduced. 

To calculate the discount we use the formula:

 

Discount  = List Price - Selling price

 

We use this discount formula when we know the original price and the price after the discount (Selling Price).

 

Selling price is the final amount of the product that is being sold after a discount has been applied to the item by the manufacturer or the seller. Some other key terms that most stores would use to describe discounts are “Off”, “Reduction”. 

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History of Discounts

For centuries, discounts have played a very vital role in making trades easier and growing businessess. In the past, merchants got discounts by trading goods or negotiating to lower prices and ensuring a good deal. Around the 1st century AD, merchants in Mesopotamia and Egypt based their prices on customer loyalty or the amount of items purchased. This made discounts exclusive to only a few customers. In the 15th century traders and merchants introduced discount pricing to attract more customers, marking this as the first time discounts were officially used. 

 

As years passed by, discounts started to get more popular and structured. Department stores began to offer clearance sales and seasonal discounts. Coupons started to get more popular and in 1887 Coca-Cola issued the first discount coupon as a form of advertising. In more recent years, discounts have become extremely popular and stores like Amazon offer discounts almost on a regular basis. Today, they play a crucial role in marketing, advertising, and attracting customers.

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Properties of Discounts

Discounts have several properties that show how they work in math and in businesses.

 

  • The original price will always get reduced. Regardless of the discount percentage, the selling price will always be less than the list price.

 

  • When multiple discounts are given, they are applied one after the other. They are not added together. So, if a product has a 20% discount first and then another 10% discount. The second discount is applied to the new reduced price and not the list price.

 

  • Discounts can be a fixed amount or a percentage of the original price.
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Types of discounts

Discounts are usually offered when purchasing an item from a seller or manufacturers. There are three types of discounts:

 

Trade Discounts

This discount is usually offered by the distributor to the seller, not the end customer. Distributors usually have items in huge quantities and offers the item to the retailer for a reduced price.

 

Quantity Discounts

If a customer buys products in huge quantities from the seller, then quantity discounts would be offered to the customer. This is usually offered to attract customers to buy large quantities of an item.

 

Promotional Discounts

Most stores or manufacturers offer promotional discounts when a new product is in stock or when there is a clearance sale. Some sellers also promote a “buy one get one free” offer.

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Formulas of Discounts

There are a few formulas we use to calculate discounts:

 

  • Discount = List Price - Selling Price
     
  • Discount % = (Discount / List Price) × 100
     
  • Discount = (Discount% / 100) × List price
     
  • Selling Price = List Price - Discount
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Importance of Discounts

Discounts can be important, especially for businesses, stores, and distributors. It encourages more sales and attracts more customers. It also benefits customers who want to buy items without it affecting their overall budget. Discounts can also be used to sell old stock that is either outdated or overstocked, this would benefit the sellers and distributors getting rid of items without much of a loss.

 

E-commerce platforms benefit from discounts as these platforms are used by people who stay in remote places and cannot access the products they want. So sellers have their online stores where they offer discounts allowing for more customers on a global scale.

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Tips and Tricks to Master Discounts

Understanding the concept of discounts can be quite easy. But it can get quite confusing so here are a few easier approaches to make it much easier. Here are some tips and tricks:

 

  • Memorize the basic discount formula: Students must memorize the basic discount formulas. Practice with real-life problems and different values to get comfortable with the formulas.

 

  • Learn to quickly calculate percentages: Try to learn ways to calculate percentages of a number. For example, to find 10% of a number we need to move the decimal point one place to the left. So, 10% of 500 is 50.

 

  • Practice in the real world: When you go shopping the next time, you can check the discount tags and calculate the final price yourself. You could even compare different discounts and find out what would be a better deal.
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Real-World Applications of Discounts

Discounts are applied in all kinds of shops, groceries, or online stores. Here are a few other real-world applications where we apply discounts

 

  • Many companies such as Amazon and Apple Music offer discounts that are specifically for students. These are discounts targeted only towards students.

 

  • Many Fast food restaurants and cafés offer seasonal discounts to gather more customers and promote their seasonal items.

 

  • Gyms offer discounts on memberships for customers based on the gym’s packages.
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Common Mistakes and How to Avoid Them in Discounts

Knowing what discounts are is quite easy, but it is possible for students to make common mistakes. Here are some mistakes and ways to avoid them:

Mistake 1

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Adding two discounts instead of applying them one by one.

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When two discounts are given, apply the first discount on the original price. We then apply the second discount on the reduced price and not on the original price.

Mistake 2

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Getting the discount amount and discount percentage confused with each other. 

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Sometimes students may confuse the discount percentage with the actual discount amount. Make sure to know what the percentage symbol is (%).

Mistake 3

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Not converting the percentage to decimal in the formula

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When using the formulas, remember to convert the percentage to a decimal value. We need to divide the percentage by 100 to get a decimal value.

Mistake 4

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Ignoring the “Up to”.

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Most stores do not use the word discount, they may use words like “up to 60% off”. Up to usually indicates that not all items have a fixed discount. Some items may be lower than 60% as well.

Mistake 5

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Forgetting to double-check the answers

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When calculating using discount formulas, students may forget to double-check the answer. Sometimes the answers might be an incorrect answer such as getting a higher discount amount.

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Solved Examples on Discounts

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Problem 1

A shirt costs $500, and the store gives a 10% discount. What is the discount amount?

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The discount is $50.

Explanation

Discount  = (Discount % × List price) / 100

Discount = (10 × 500) / 100 = $50

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Problem 2

A bicycle costs $6000, and a 20% discount is given by the manufacturer. What is the final selling price?

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The selling price is $4800

Explanation

First, we find the discount amount:

Discount = (20 × 6000) / 100 = $1200

Now, we subtract the list price from the selling price

Selling price = 6000 - 1200 = $4800

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Problem 3

A mobile phone was originally $2500, but it was sold for $2,250 after a discount. What was the discount percentage?

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10% discount

Explanation

First we find the discount amount: Discount = $2500 - $2250 = $250

Then, we find the discount percentage: Discount percentage = (250 / 2500) × 100 = 10%

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Problem 4

A laptop costs $5000. A store offers a 10% discount first, then an extra 5% on the new price. What is the final selling price?

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The final selling price is $4275

Explanation

First discount (10%)

10% of $5000 = (10/100) × 5000 = $500

New price = $5000 - $500 = $4500

 

Second Discount (5%)

5% of $4500 = 5/100 × 4500 = $225

Final price = $4500 - $225 = $4,275

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Problem 5

A student is buying a set of textbooks that costs $250. The bookstore is offering a 15% discount. What is the final price?

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The final price for the textbooks is $212.50

Explanation

Discount = (15 / 100) × 250 = $37.50

Final Price = 250 - 37.50 = 212.50

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FAQs On Discounts

1.What is discount in math?

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2.What is the formula used to find the discount amount?

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3.What is meant by successive discounts?

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4.What is a fixed discount?

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5.Why do businesses offer discounts?

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Dr. Sarita Ghanshyam Tiwari

About the Author

Dr. Sarita Tiwari is a passionate educator specializing in Commercial Math, Vedic Math, and Abacus, with a mission to make numbers magical for young learners. With 8+ years of teaching experience and a Ph.D. in Business Economics, she blends academic rigo

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