At the produce store you can buy 4 bags of bananas for $24.24. how much would it cost if you were to buy 3 bags? show how you got the answer.

There are 2 ways to do this...

(1) find the unit price4 bags for 24.2424.24 / 4 = 6.06 per bag
so 3 bags would cost : (6.06 * 3) = 18.18 <==

(2) or proportion
4 / 24.24 = 3 / x4 bags to 24.24 = 3 bags to x
cross multiply
(4)(x) = (24.24)(3)
4x = 72.72
x = 72.72 / 4
x = 18.18 <===

Dwould be the answer