Question

How do I calculate percentage is a number? Ex. 30% is 15

And how do I calculate percentage of a number? Ex. 35% of 670

Answer 1

i learned it as "is" over "of" "per" over "cent"

cent means 100

what IS 30% OF 670

so that would be

x/670 30/100

and then you cross multiply

100x = 20100

x = 201

Answer 2

You first divide the number by 100 and then multiply it by the percentage that you are given