7 balls/9 balls = ? balls/27 balls
First, we want to find out how many times we need to multiply 9 to get to 27.
27/9= 3
We must multiply 9 three times to get twenty seven, and we must multiply the numerator by 3 as well to make it equal.
7*3 = 21
21 balls / 27 balls
The answer is 21