18/21 as a decimal and a percentage
18/21
= 0.857142 = 85.714285%
18/21 means 18 out of 21 equal parts. As a decimal it is 0.857142…, and as a percentage 85.714285…%.
Ways to write it
- Decimal
- 0.857142
The digits under the line repeat forever. - Percentage
- 85.714285%
- Simplest form
- 6/7
- As a division
- 18 ÷ 21
- Equivalent fractions
- 12/14 = 24/28 = 30/35 = 6/7
- Compared with one half
- More than 1/2
- Reciprocal
- 21/18
- 18/21 of 126
- 108
How to work it out
- Divide the top number by the bottom number: 18 ÷ 21 = 0.857142….
- To make a percentage, multiply by 100: 0.857142… × 100 = 85.714285…%.
- To simplify, divide the top and bottom by 3, their highest common factor: 18 ÷ 3 = 6 and 21 ÷ 3 = 7, so 18/21 = 6/7.
Quick check
Is 18/21 more or less than 1/2?
Show the answer
More than 1/2
What is 18/21 of 126?
Show the answer
108
18/21 = ?/42
Show the answer
36
Practice with a game
Frequently asked questions
What is 18/21 as a decimal?
18/21 as a decimal is 0.857142….
What is 18/21 as a percentage?
18/21 as a percentage is 85.714285…%.
What is 18/21 in its simplest form?
18/21 in its simplest form is 6/7.