0.8 as a Fraction

0.8 as a fraction is 4/5 in simplest form, which is 80%.

Result

Answer

0.8 = \textcolor{#0b5c56}{\frac{4}{5}}

0.8 as a fraction is 4/5.

  • Percent: 80%
014/5

Step-by-step solution

The problem

0.8

  1. Write the digits over 10. 0.8 has 1 decimal place, so put the digits (without the point) over 1 followed by 1 zero.

    = \textcolor{#0b5c56}{\frac{8}{10}}

  2. Simplify. List the factors of each:
    Factors of 8: 1, 2, 4, 8
    Factors of 10: 1, 2, 5, 10
    The greatest common factor (GCF) is 2. Divide the top and bottom by 2.

    = \frac{8 \div 2}{10 \div 2} = \textcolor{#0b5c56}{\frac{4}{5}}

All the working together

\begin{aligned} &0.8 \\[8pt] &= \frac{8}{10} && \textcolor{#5b6660}{\textsf{over 10}} \\[8pt] &= \frac{8 \div 2}{10 \div 2} && \textcolor{#5b6660}{\textsf{simplify}} \\[8pt] &= \textcolor{#0b5c56}{\frac{4}{5}}\end{aligned}

0.8 in other forms

Fraction (simplest form)4/5
Before simplifying8/10
Percent80%
The other way4/5 as a decimal

Nearby decimals as fractions

DecimalFractionPercent
0.753/475%
0.7619/2576%
0.7777/10077%
0.7839/5078%
0.7979/10079%
0.84/580%
0.8181/10081%
0.8241/5082%
0.8383/10083%
0.8421/2584%
0.8517/2085%

Frequently asked questions

What is 0.8 as a fraction?

0.8 as a fraction is 4/5. 0.8 has 1 decimal place, so write the digits over 10: 8/10. Divide the top and bottom by 2 (their greatest common factor) to get 4/5.

What is 0.8 as a percent?

0.8 is 80%: multiply by 100 (move the decimal point two places to the right).

Is 4/5 the simplest form?

Yes. 4 and 5 have no common factor other than 1, because the greatest common factor 2 was divided out of 8/10.

More decimals as fractions

Any other decimal, including longer repeating ones: use the Decimal to Fraction Calculator, or look it up on the printable fraction chart.