Question

The ratio of cups of orange juice concentrate to water in a punch recipe is 1 : 6. If Stefan made 18 cups of punch, how many cups of orange juice concentrate did he use?

Answer 1

We have the next information

1 cup of orange juice concentrate by 6 cups of water in order to do 7 cups of punch

We want to know how many cups of orange juice concentrate he uses in 18 cups of punch

1 cup orange juice concentrate ------ 7 cups of punch

x ------ 18 cups of punch

x is the cups of orange juice concentrate in 18 cups of punch

x can be calculated if we divide 18 between 7

`x=(18)/(7)=2.57\text{ }`

we will need 2.57 cups of orange juice concentrate