What percent of 75 is 15? i need a full explanation !

1) step 1 the way you calculate this is by dividing the number in question by the number which comes after the "of"

So:

x percent of y is:



a percent of b is:



and for us:

x percent of y is:



we can also simplify it:
 



for this i divided both numbers by 15.

2) for the second step you multiply the fraction by 100%, ,which is 1: you can always multiply by 1!

=20%

because 100/5=20

was is clear? let me know if you have more questions!