9/21 as a decimal and a percentage
9/21
= 0.428571 = 42.857142%
9/21 means 9 out of 21 equal parts. As a decimal it is 0.428571…, and as a percentage 42.857142…%.
Ways to write it
- Decimal
- 0.428571
The digits under the line repeat forever. - Percentage
- 42.857142%
- Simplest form
- 3/7
- As a division
- 9 ÷ 21
- Equivalent fractions
- 6/14 = 12/28 = 15/35 = 3/7
- Compared with one half
- Less than 1/2
- Reciprocal
- 21/9
- 9/21 of 84
- 36
How to work it out
- Divide the top number by the bottom number: 9 ÷ 21 = 0.428571….
- To make a percentage, multiply by 100: 0.428571… × 100 = 42.857142…%.
- To simplify, divide the top and bottom by 3, their highest common factor: 9 ÷ 3 = 3 and 21 ÷ 3 = 7, so 9/21 = 3/7.
Quick check
Is 9/21 more or less than 1/2?
Show the answer
Less than 1/2
What is 9/21 of 84?
Show the answer
36
9/21 = ?/42
Show the answer
18
Practice with a game
Frequently asked questions
What is 9/21 as a decimal?
9/21 as a decimal is 0.428571….
What is 9/21 as a percentage?
9/21 as a percentage is 42.857142…%.
What is 9/21 in its simplest form?
9/21 in its simplest form is 3/7.