Question

A bookstore had 90 copies of a magazine. Yesterday, it sold 1 over 6 of them. Today, it sold 1 over 3 of what remained. How many copies does the bookstore have left?

Answer 1

90 total

$\frac{1}{6}$ of 90 (15) sold yesterday.

90 - 15 = 75 remaining.

$\frac{1}{3}$ of 75 (25) sold today.

75 - 25 = 50 copies remaining.