Jodi plans to make 5 dozen cupcakes. The recipe she uses is for 2 dozen cupcakes and calls for 1 1/2 cups of flour. How many cups of flour will Jodi need to make 5 dozen cupcakes?

Either ratio or proportion or recognize that

2 times 2.5=5, so 1 and 1/2 times 2.5=amount needed

assuming you don't know that

ratio and proportion

pancakes/flour=2/1.5

2/1.5=5/x

times both sides by 1.5x

2x=7.5

divide both sides by 2

x=3.75 cups

2 dozens = 24 cupcakes.

5 dozens = 60cupcakes.

1.5/24 = 0.0625 cups of flour / cupcake.

0.0625 x 60 = 3.75 cups of flour.

= 3 3/4 cups of flour.