Question

To make lemonade, I use a ratio of 7 parts water to 1 part lemon juice. If I want to make a gallon of lemonade, and there are four quarts in a gallon, how many quarts of water do I need? Write your answer as a proper or improper fraction.

Answer 1

In lemonade, water : lemon juice = 7:1
Therefore there are totally 8 parts.

If there are 4 parts, then
Water : lemon juice = 7/2 : 1/2

Since there are 4 quarts, 7/2 quarts of water is needed.