21/27 as a decimal and a percentage
21/27
= 0.7 = 77.7%
21/27 means 21 out of 27 equal parts. As a decimal it is 0.77…, and as a percentage 77.77…%.
Ways to write it
- Decimal
- 0.7
The digits under the line repeat forever. - Percentage
- 77.7%
- Simplest form
- 7/9
- As a division
- 21 ÷ 27
- Equivalent fractions
- 14/18 = 28/36 = 35/45 = 7/9
- Compared with one half
- More than 1/2
- Reciprocal
- 27/21
- 21/27 of 135
- 105
How to work it out
- Divide the top number by the bottom number: 21 ÷ 27 = 0.77….
- To make a percentage, multiply by 100: 0.77… × 100 = 77.77…%.
- To simplify, divide the top and bottom by 3, their highest common factor: 21 ÷ 3 = 7 and 27 ÷ 3 = 9, so 21/27 = 7/9.
Quick check
Is 21/27 more or less than 1/2?
Show the answer
More than 1/2
What is 21/27 of 135?
Show the answer
105
21/27 = ?/54
Show the answer
42
Practise with a game
Frequently asked questions
What is 21/27 as a decimal?
21/27 as a decimal is 0.77….
What is 21/27 as a percentage?
21/27 as a percentage is 77.77…%.
What is 21/27 in its simplest form?
21/27 in its simplest form is 7/9.