To find  the % we need to divide that num with 100
"The simplest way to calculate percentage is to divide the given amount by the total amount and then multiplying the answer by 100 to get the percentage of the given amount with respect to the total amount. 

The equation can be put up as follows: 
(Given amount/ Total amount) x100 

For example if John scores 60 out of 75 in mathematics we can find the percentage of his marks by dividing 60 by 75 which comes to be 0.8 and then multiplying it by 100 which gives us the percentage of his marks in math which is 80%. 
(60/75) x 100 = 80%"

Hope this helps:)