Question

Brianna bought 5 bananas for 1 dollar. Sal bought 5 bananas at $.49 a pound. If a banana weighs about 5 ounces, who got the better buy?

Answer 1

Answer:

If Briana had 5 banana/$1 = $0.30 per banana.

For Sal, we know that there are 16oz in 1 lb. So we set up the equation as the following, trying to cancel units:

$0.49/5 bananas = 1 lb/ 16oz = 5 oz/ 1 banana.

The banana units cancel, and the oz units cancel. This leaves $/banana for the units. Now we multiple and divide the numbers: (0.49*5)/16 = $0.15 per banana