Quick answer: 5/8 = 0.625 = 62.5%.
Eighths give exact (terminating) decimals because 8 = 2 × 2 × 2, so the conversion is clean.
5/8 as a decimal
Divide the numerator by the denominator:
5 ÷ 8 = 0.625
So 5/8 = 0.625.
5/8 as a percent
Multiply the decimal by 100:
0.625 × 100 = 62.5%
So 5/8 = 62.5%. The half-percent (the .5) is normal — not every fraction lands on a whole number.
The eighths table
Eighths step up by 0.125 (12.5%) each time:
| Fraction | Decimal | Percent |
|---|---|---|
| 1/8 | 0.125 | 12.5% |
| 2/8 = 1/4 | 0.25 | 25% |
| 3/8 | 0.375 | 37.5% |
| 4/8 = 1/2 | 0.50 | 50% |
| 5/8 | 0.625 | 62.5% |
| 6/8 = 3/4 | 0.75 | 75% |
| 7/8 | 0.875 | 87.5% |
Notice 5/8 sits neatly between 1/2 (50%) and 3/4 (75%).
Why eighths terminate
A fraction ends (doesn't repeat) when the denominator's only prime factors are 2s and 5s. Eight is 2³, so 5/8 terminates — unlike thirds, which repeat (see 1/3 as a percent and decimal).
Convert any fraction
For any fraction: divide top by bottom for the decimal, then multiply by 100 for the percent. Our percentage calculator does both and shows the working — handy for less obvious fractions.
Frequently asked questions
What is 5/8 as a decimal?
What is 5/8 as a percent?
Why does 5/8 give an exact decimal?
Is 5/8 bigger than 1/2?
What is 5/8 of 100?
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