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Last updated on May 26th, 2025

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21 minutes as a decimal

Professor Greenline Explaining Math Concepts

This is a simple question on converting time to decimals. Understanding time and decimal representation is essential. When considering minutes as a part of an hour, we think of 60 minutes as a whole. A decimal is a way to represent numbers that are not whole, using a decimal point (.) to separate the whole part from the fractional part. The numbers to the left of the decimal point represent the whole, and those to the right represent the fractional part.

21 minutes as a decimal for Indonesian Students
Professor Greenline from BrightChamps

What is 21 minutes as a decimal?

21 minutes as a decimalAnswer

 

21 minutes as a decimal of an hour can be written as 0.35. This decimal shows the fraction of an hour that 21 minutes represents.

 

Explanation

 

To convert 21 minutes into a decimal, we use division. Since there are 60 minutes in an hour, 21 minutes is a fraction of an hour. Let's see the step-by-step breakdown of the process:

 

Step 1: Identify the part (21 minutes) and the whole (60 minutes in an hour).

 

Step 2: Use the division method: divide 21 by 60 to get the decimal.

 

Step 3: Perform the division: 21 ÷ 60 = 0.35.

 

Step 4: The result, 0.35, is the decimal representation of 21 minutes as a fraction of an hour.

Professor Greenline from BrightChamps

Important Glossaries for 21 minutes as a decimal

  • Minute: A unit of time equal to 1/60th of an hour.

 

  • Decimal: A number that uses the base ten and includes a decimal point to separate the whole part from the fractional part.

 

  • Division: A mathematical operation where one number is divided by another to find a quotient.

 

  • Fraction: A numerical quantity that is not a whole number, representing a part of a whole.

 

  • Quotient: The result obtained by dividing one number by another.
Professor Greenline from BrightChamps

About BrightChamps in Indonesia

At BrightChamps, math questions are more than simple exercises—they open up countless possibilities! Our mission is to support kids across Indonesia in developing key skills like today’s focus on the 21 minutes as a decimal, with particular attention on decimal conversions—in a fun, engaging, and easy-to-understand way. Whether your child is figuring out the speed of a roller coaster at Dunia Fantasi, keeping score in a local badminton game, or managing their allowance to buy gadgets, mastering math builds their confidence to tackle daily challenges. Our interactive lessons make learning both fun and easy. Since children in Indonesia learn differently, we tailor our approach to meet their individual styles. From the lively streets of Jakarta to the gorgeous beaches of Bali, BrightChamps makes math relevant and exciting throughout Indonesia. Let’s make decimal conversions a fun part of every child’s learning journey!
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