Question

Brianna was making a recipe that said the ingredients were for 6 people, but she needed to make it for 8 people. The recipe called for 2 2/3 cups of milk and 1/4 cup of oil. How many cups of these liquid ingredients did she need for 8 people?

Answer 1

You can use proportions.

Milk:

6 is to 2 2/3 as 8 is to x

6/(2 2/3) = 8/x

6/(8/3) = 8/x

6x = 8 * 8/3

6x = 64/3

x = 32/9

x = 3 5/9

Oil:

6 is to 1/4 as 8 is to x

6/(1/4) = 8/x

6x = 1/4 * 8

6x = 2

x = 2/6

x = 1/3