Decimal
0.125
What is 1/8 as a decimal and percent?
Answer
1/8 as a decimal is 0.125. As a percent, 1/8 is 12.5%.
Percent
12.5%
Step-by-step working
1
Divide the numerator by the denominator
To turn any fraction into a decimal, divide the top by the bottom.
1 ÷ 8 = 0.125
2
Multiply by 100 for the percent
Percent means "out of one hundred". Multiplying a decimal by 100 (or moving the decimal point two places to the right) gives the percent value.
0.125 × 100 = 12.5%
3
Round if needed
In this case 1/8 produces a clean terminating decimal — no rounding is needed.
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Decimal
0.125
Percent
12.5%
About this fraction
One-eighth shows up in pizzas (eight slices), musical time signatures (1/8 notes), and imperial measurements (a furlong is 1/8 of a mile). The decimal 0.125 is exact.
Common conversions
Related fractions and their decimal / percent values for quick comparison.
| Fraction | Decimal | Percent |
|---|---|---|
| 1/8 | 0.125 | 12.5% |
| 3/8 | 0.375 | 37.5% |
| 5/8 | 0.625 | 62.5% |
| 7/8 | 0.875 | 87.5% |
| 1/2 | 0.5 | 50% |
| 1/3 | 0.(3) | 33.3333% |
| 2/3 | 0.(6) | 66.6667% |
Frequently asked questions
What is 1/8 as a decimal?
1/8 as a decimal is 0.125. The decimal terminates cleanly. Divide the numerator by the denominator: 1 ÷ 8 = 0.125. For most everyday work, round to two or three decimal places.
What is 1/8 as a percent?
1/8 as a percent is 12.5%. Take the decimal value (0.125) and move the decimal point two places to the right — the same as multiplying by 100.
Is 1/8 already in lowest form?
Yes. 1/8 is already in lowest form because the greatest common divisor of 1 and 8 is 1.
Does 1/8 terminate or recur as a decimal?
1/8 terminates as a decimal. The denominator (after simplifying to 1/8) has only 2 and 5 as prime factors, so the long division ends.