20 because 75% of 20 is 15
**Answer: **20
**Step-by-step explanation: **In this problem, 15 is being represent as the part so we will have 15 over the part which we don't know which is going to be represented as 'x.' 75% is obviously the part which we will put over 100%.
Now, we can apply the cross products.
1500% = 75%x
X = 20
15 is 75% of 20. We find this by setting up the equation where 15 equals 75% of an unknown number and solving for that number. The solution shows that the unknown number, or total, is 20.
;