Question

You need 1 1/4 cups of sugar to make 20 cookiesTo make 12 cookies, you will need cups of sugar.Enter your answer as a fraction or whole number.

Answer 1

1 1/4cups----------------------------->20cookies

x cups -------------------------------->12 cookies

Using cross multiplication:

`\begin{gathered} 1\cdot(1)/(4)=(4+1)/(4)=(5)/(4) \\ (5)/((4)/(x))=(20)/(12) \\ (5)/(4x)=(5)/(3) \\ \text{solve for x:} \\ (15)/(20)=x \\ x=(3)/(4) \end{gathered}`