In Ms. Gonzalez 3rd period class of 20 students, 75% students have an older sibling. How many students are in the class?

Question

A box of colored candies contains 9 red candies. Twenty percent of the candies in the box are red. How many candies are in the box?

Answer 1

I'd say there are 20 students, as you just pointed out.

If the box has x candies, then
0.20x = 9
x = 45