### Instruction: 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.### Response: To make a gallon of lemonade, we need to use $7$ parts water to $1$ part lemon juice.
So, we should use $\dfrac{7}{1+7}=\dfrac{7}{8}$ of a gallon of water.
A gallon is equal to four quarts, so we should use $\dfrac{7}{8}*4=\dfrac{7}{2}$ quarts of water.
That's an improper fraction.