Question

On another day, Martin bought 123
5
pounds of grapes for a picnic. His friend bought 3
8
of that amount. Use compatible fractions to estimate how many pounds of grapes Martin’s friend bought.

123
5
→

3
8
→

Martin's friend bought about
pounds of grapes.

Answer 1

Interpret Martin's amount as 123/5. Use a compatible fraction close to 123/5:

123/5 → 120/5 = 24
3/8 → 3/8

Now find 3/8 of 24: (3/8)·24 = 72/8 = 9.

Martin’s friend bought about 9 pounds of grapes.