Martin had 7 pounds of grapes left, and he gave away 2 5 of them. Explain how to use compatible numbers to estimate the amount of grapes he gave away.

Question

Martin had 7 pounds of grapes left, and he gave away 2
5
of them. Explain how to use compatible numbers to estimate the amount of grapes he gave away.

Answer 1

he gave away 2/5 of 7. (2/5)(7) = 14/5 = 2.8 pounds given away

2/5 = X/7 the ratios are the same

2/5 = 2.8/7

2.8 is 40% larger than 2. 7 is 40% larger than 5