Decimal
0.8
What is 4/5 as a decimal and percent?
Answer
4/5 as a decimal is 0.8. As a percent, 4/5 is 80%.
Percent
80%
Step-by-step working
1
Divide the numerator by the denominator
To turn any fraction into a decimal, divide the top by the bottom.
4 ÷ 5 = 0.8
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.
0.8 × 100 = 80%
3
Round if needed
In this case 4/5 produces a clean terminating decimal — no rounding is needed.
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Decimal
0.8
Percent
80%
About this fraction
The fraction 4/5 terminates as 0.8. As a percent, it equals 80.0%.
Common conversions
Related fractions and their decimal / percent values for quick comparison.
| Fraction | Decimal | Percent |
|---|---|---|
| 1/5 | 0.2 | 20% |
| 2/5 | 0.4 | 40% |
| 3/5 | 0.6 | 60% |
| 4/5 | 0.8 | 80% |
| 1/2 | 0.5 | 50% |
| 1/3 | 0.(3) | 33.3333% |
| 2/3 | 0.(6) | 66.6667% |
Frequently asked questions
What is 4/5 as a decimal?
4/5 as a decimal is 0.8. The decimal terminates cleanly. Divide the numerator by the denominator: 4 ÷ 5 = 0.8. For most everyday work, round to two or three decimal places.
What is 4/5 as a percent?
4/5 as a percent is 80%. Take the decimal value (0.8) and move the decimal point two places to the right — the same as multiplying by 100.
Is 4/5 already in lowest form?
Yes. 4/5 is already in lowest form because the greatest common divisor of 4 and 5 is 1.
Does 4/5 terminate or recur as a decimal?
4/5 terminates as a decimal. The denominator (after simplifying to 4/5) has only 2 and 5 as prime factors, so the long division ends.