Question

A recipe uses 5 cups of flour for every 2 cups of sugar how much flour is needed for 1 cup of sugar

Answer 1

2.5 cups of flour

5 = 2
2 divided by 2 = 1
5 divided by 2 = 2.5

Answer 2

There are a couple of ways to look at this.

 

1)  Set up a ratio:  2 cups sugar to 5 cups flour = 5 cups sugar to x cups flour

                           2/5 = 5/x

                           cross multiply

                           2x = 25

                           x = 12 1/2 cups flour

 

2)  Look at the factor by which the cups of sugar was increased and increase

    the cups of flour by the same factor.

    2x = 5

    x = 2.5

   The sugar was increased by a factor of 2.5 so increase flour by same factor.

   5(2.5) = 12 1/2 cups flour