3/21 as a decimal and a percentage
3/21
= 0.142857 = 14.285714%
3/21 means 3 out of 21 equal parts. As a decimal it is 0.142857…, and as a percentage 14.285714…%.
Ways to write it
- Decimal
- 0.142857
The digits under the line repeat forever. - Percentage
- 14.285714%
- Simplest form
- 1/7
- As a division
- 3 ÷ 21
- Equivalent fractions
- 2/14 = 4/28 = 5/35 = 1/7
- Compared with one half
- Less than 1/2
- Reciprocal
- 21/3
- 3/21 of 126
- 18
How to work it out
- Divide the top number by the bottom number: 3 ÷ 21 = 0.142857….
- To make a percentage, multiply by 100: 0.142857… × 100 = 14.285714…%.
- To simplify, divide the top and bottom by 3, their highest common factor: 3 ÷ 3 = 1 and 21 ÷ 3 = 7, so 3/21 = 1/7.
Quick check
Is 3/21 more or less than 1/2?
Show the answer
Less than 1/2
What is 3/21 of 126?
Show the answer
18
3/21 = ?/42
Show the answer
6
Practise with a game
Frequently asked questions
What is 3/21 as a decimal?
3/21 as a decimal is 0.142857….
What is 3/21 as a percentage?
3/21 as a percentage is 14.285714…%.
What is 3/21 in its simplest form?
3/21 in its simplest form is 1/7.