15/21 as a decimal and a percentage
15/21
= 0.714285 = 71.428571%
15/21 means 15 out of 21 equal parts. As a decimal it is 0.714285…, and as a percentage 71.428571…%.
Ways to write it
- Decimal
- 0.714285
The digits under the line repeat forever. - Percentage
- 71.428571%
- Simplest form
- 5/7
- As a division
- 15 ÷ 21
- Equivalent fractions
- 10/14 = 20/28 = 25/35 = 5/7
- Compared with one half
- More than 1/2
- Reciprocal
- 21/15
- 15/21 of 42
- 30
How to work it out
- Divide the top number by the bottom number: 15 ÷ 21 = 0.714285….
- To make a percentage, multiply by 100: 0.714285… × 100 = 71.428571…%.
- To simplify, divide the top and bottom by 3, their highest common factor: 15 ÷ 3 = 5 and 21 ÷ 3 = 7, so 15/21 = 5/7.
Quick check
Is 15/21 more or less than 1/2?
Show the answer
More than 1/2
What is 15/21 of 42?
Show the answer
30
15/21 = ?/42
Show the answer
30
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Frequently asked questions
What is 15/21 as a decimal?
15/21 as a decimal is 0.714285….
What is 15/21 as a percentage?
15/21 as a percentage is 71.428571…%.
What is 15/21 in its simplest form?
15/21 in its simplest form is 5/7.