To write 64/75 as a percentage we will first have to turn it into a decimal.
To turn it into a decimal, you divide the numerator by the denominator.
>>>64 divided by 75 is 0.8333333.
Now to turn the decimal into a percent, you multiply the decimal by 100. Or bring it two place values up.
>>>0.833333333 times 100 is 83.333.... repeating.
As a conclusion your answer is 83.33%.