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Last updated on May 26th, 2025

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21 1/3 as a Decimal

Professor Greenline Explaining Math Concepts

It is a simple question on decimal conversion. Firstly, we have to learn fractions, mixed numbers, and decimals. A fraction represents a part of a whole. It has two parts: the numerator (number on the top) here, 1, represents how many parts out of the whole. The denominator (number below) shows how many parts make the whole; here, it is 3. A mixed number combines a whole number and a fraction. A decimal is a way to represent a number that is not whole, using a (.) or a decimal to separate the whole part from the fraction part. The numbers to the left of the decimal point represent the whole, and those to the right represent the fractional part.

21 1/3 as a Decimal for Qatari Students
Professor Greenline from BrightChamps

What is 21 1/3 as a decimal?

21 1/3 as a decimal

Answer

 

21 1/3 in decimals can be written as 21.33333... It is a recurring decimal, indicating that the digit 3 will repeat infinitely.

 

Explanation

 

To get 21 1/3 in decimal, we first convert the fraction 1/3 into a decimal. Using the division method, 1 divided by 3 gives 0.3333... Now we add this decimal to the whole number 21. Let's see the step-by-step breakdown of the process:

 

Step 1: Identify the whole number and the fraction. The whole number is 21, and the fraction is 1/3.

 

Step 2: Convert the fraction 1/3 into a decimal by dividing the numerator (1) by the denominator (3).

 

Step 3: As 1 is smaller than 3, we use decimal division. We add a decimal point in the quotient and treat the 1 as 10.

 

Step 4: Divide 10 by 3, which gives 3 with a remainder of 1. Bring down another 0 to make it 10 again. Repeat the division process.

 

Step 5: The division process continues, as we don't get a remainder of 0. This process leads to a recurring decimal.

 

Thus, 21 1/3 as a decimal is 21.3333...

Professor Greenline from BrightChamps

Important Glossaries for 21 1/3 as a decimal

  • Fraction: A numerical quantity that is not a whole number, representing a part of a whole.
     
  • Decimal: A number that uses the base ten and includes a decimal point to separate the whole part from the fractional part.
     
  • Mixed Number: A number consisting of an integer and a proper fraction.
     
  • Recurring Decimal: A decimal fraction that repeats a digit or group of digits infinitely.
     
  • Division: A mathematical operation where a number is divided into equal parts.
Professor Greenline from BrightChamps

About BrightChamps in Qatar

At BrightChamps, math questions go beyond mere calculations—they unlock endless possibilities! Our goal is to support children throughout Qatar in mastering essential skills, such as today’s focus on the 21 1/3 as a Decimal with a special emphasis on decimal conversions—in an engaging, enjoyable, and easy-to-understand manner. Whether your child is calculating the speed of a roller coaster at Qatar’s Angry Birds World, following scores at a local football match, or managing their allowance to buy gadgets, solid math skills boost their confidence for daily challenges. Our interactive lessons are designed to be fun and accessible. Since kids in Qatar learn in unique ways, we tailor our teaching to each child’s learning style. From Doha’s modern cityscape to its desert surroundings, BrightChamps brings math to life, making it exciting and relevant across Qatar. Let’s make decimal conversions a fun part of every child’s math journey!
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