0.3 as a fraction
0.3 is 3 tenths, so write it as 3/10.
The answer
0.3 = 3/10
How to write 0.3 as a fraction
Put the digits in a place value chart. The place of the last digit tells you the bottom of the fraction.
| Ones | Tenths |
|---|---|
| 0 | 3 |
The last digit is in the tenths column, so 0.3 is 3 tenths: 3/10.
3 and 10 share no factor except 1, so 3/10 is already in its simplest form.
As a percentage, 0.3 = 30%: multiply by 100, which moves each digit two places to the left.
To check, divide back: see 3/10 as a decimal and 3/10 as a percentage.
See 3/10
Shade 3/10 on a fraction wall
This wall shows selected denominators: halves, thirds, quarters, fifths, sixths, eighths and tenths. Other fractions on this site may not have a row here. The wall opens with 3/10 shaded in the tenths row. Look straight down: no other row ends in exactly the same place, so no other fraction on this wall equals 3/10. Tap other pieces to try more fractions.
A fraction wall from halves to tenths, opening on 3/10.
More decimals as fractions
Questions parents ask
What is 0.3 as a fraction in its simplest form?
0.3 = 3/10. 3 and 10 share no factor except 1, so 3/10 is already in its simplest form.
How do you write 0.3 as a fraction?
The last digit of 0.3 is in the tenths column, so write the digits over 10: 3/10. Then simplify if you can.
What is 0.3 as a percentage?
0.3 = 30%. Multiply by 100: the digits move two places to the left.
Continue your maths practice
Explore the diagnostic for another way to practise.