0.125 as a fraction
0.125 is 125 thousandths, so write it as 125/1,000 and simplify to 1/8.
The answer
0.125 = 1/8
How to write 0.125 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 | Hundredths | Thousandths |
|---|---|---|---|
| 0 | 1 | 2 | 5 |
The last digit is in the thousandths column, so 0.125 is 125 thousandths: 125/1,000.
Simplify by dividing the top and bottom by the same number. In one go, divide by the highest common factor (the biggest whole number that divides both exactly), 125: 125/1,000 = 1/8.
If you cannot spot 125, smaller steps get there too:
- Divide by 5: 25/200
- Divide by 5: 5/40
- Divide by 5: 1/8
1 and 8 share no factor except 1, so 1/8 is the simplest form.
As a percentage, 0.125 = 12.5%: multiply by 100, which moves each digit two places to the left.
To check, divide back: see 1/8 as a decimal and 1/8 as a percentage.
See 1/8
Shade 1/8 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 1/8 shaded in the eighths row. Look straight down: no other row ends in exactly the same place, so no other fraction on this wall equals 1/8. Tap other pieces to try more fractions.
A fraction wall from halves to tenths, opening on 1/8.
More decimals as fractions
Questions parents ask
What is 0.125 as a fraction in its simplest form?
0.125 = 125/1,000 = 1/8. Divide the top and bottom of 125/1,000 by 125 to get 1/8.
How do you write 0.125 as a fraction?
The last digit of 0.125 is in the thousandths column, so write the digits over 1,000: 125/1,000. Then simplify if you can.
What is 0.125 as a percentage?
0.125 = 12.5%. Multiply by 100: the digits move two places to the left.
Continue your maths practice
Explore the diagnostic for another way to practise.