Practice!

Sample Problem

Melisa baked 84 cookies. After giving some cookies to Molly and Jean, she had  of her cookies left. On average, how many cookies did Molly and Jean each receive?

  cookies

Solution

Average = sum of the parts ÷ number of parts

Sum of the parts = number of cookies Molly and Jean received altogether

Number of parts = Molly and Jean = 2

The number of cookies Melissa had left: 84 × 1/3 = 28 cookies

The number of cookies Molly and Jean received: 84 – 28 = 56 cookies

Therefore, the average each friend received: 56 ÷ 2 = 28 cookies