80%

The rule for converting fractions to percents is to first convert it to a decimal, then to multiply by 100. So the first step would be to divide the numerator(the top) by the denominator(the bottom) ##4/5 = 4//5 = 0.8 ## The second step would be to then multiply by 100 ##0.8 * 100 = 80## The final step is to tack on the percent sign, which would give you ##80%##