To solve for this, we need to set up fractional proportions. We have x% out of 100%, x being what we're looking for and 100 being the total maximum percent. We have 15 out of 20, being one of our fractions. Our fractions are: x/100 = 15/20. To solve for this, we need to cross multiply the denominator of one fraction by the numerator of the other fraction. Multiply x and 20, and then 100 and 15. You should end up with: 20x = 1500. Divide both sides by 20 to solve for x. 20x/20 = x. 1500/20 = 75. x = 75. Your final and absolute answer is : 15 is 75% of 20. I hope this helps!
