Question

A bag contains 10 white golf balls and 6 striped golf balls. A golfer wants to add 112 golf balls to the bag. He wants the ratio of white to striped golf balls to remain the same. How many of each should he add?

Answer 1

10 out of (10 + 6) are white right now, which is 10/16 or 5/8.
He wants to add 112 balls, so 112 times 5/8 should be white.