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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 Canadian 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 Canada

At BrightChamps, math questions are more than just calculations—they’re pathways to new possibilities! We aim to help children all over Canada build key skills, such as today’s focus on the 21 minutes as a decimal with an emphasis on decimal conversions—taught in an engaging, fun, and clear manner. Whether your child is figuring out how fast a roller coaster moves at Canada’s Wonderland, keeping score during a hockey game, or managing their allowance for gadgets, strong math skills give them confidence for everyday situations. Our engaging lessons are designed to be easy and enjoyable. Since children in Canada learn in diverse ways, we customize our teaching to match their needs. From the vibrant streets of Toronto to the stunning scenery of British Columbia, BrightChamps makes math come alive, making it exciting and relevant across Canada. Let’s turn decimal conversions into a fun part of every child’s math experience!
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