21/30 as a decimal and a percentage
21/30
= 0.7 = 70%
21/30 means 21 out of 30 equal parts. As a decimal it is 0.7, and as a percentage 70%.
Ways to write it
- Decimal
- 0.7
- Percentage
- 70%
- Simplest form
- 7/10
- As a division
- 21 ÷ 30
- Equivalent fractions
- 14/20 = 28/40 = 35/50 = 7/10
- Compared with one half
- More than 1/2
- Reciprocal
- 30/21
- 21/30 of 150
- 105
How to work it out
- Divide the top number by the bottom number: 21 ÷ 30 = 0.7.
- To make a percentage, multiply by 100: 0.7 × 100 = 70%.
- To simplify, divide the top and bottom by 3, their highest common factor: 21 ÷ 3 = 7 and 30 ÷ 3 = 10, so 21/30 = 7/10.
Quick check
Is 21/30 more or less than 1/2?
Show the answer
More than 1/2
What is 21/30 of 150?
Show the answer
105
21/30 = ?/60
Show the answer
42
Practise with a game
Frequently asked questions
What is 21/30 as a decimal?
21/30 as a decimal is 0.7.
What is 21/30 as a percentage?
21/30 as a percentage is 70%.
What is 21/30 in its simplest form?
21/30 in its simplest form is 7/10.