Question

A cookie recipe called for 2 1/2 cups of sugar for every 2/5 cup of flour. If you made a batch of cookies using 1 cup of flour, how many cups of sugar would you need?

Answer 1

2x2=4+1=5 2 1/2×2=5 5+1 1/4( 1/2 of 2 1/2)=6 1/4

Answer 2

1 cup of flour* (2 1/2 cups of sugar/ 2/5 cup of flour)= 6 1/4 cups of sugar.
(Note that the unit cancels out so you get the answer)

The final answer is 6 1/4 cups of sugar~