If the flour to sugar ratio is 5 cups flour to 1 cup sugar, then how much sugar is needed if only 2 cups of flour are used?

1 Answer
Elle
Oct 31, 2015

#2/5# cups are needed.

Explanation:

You write it out as a ratio.
#(5/1)=(2/x)#
You cross-multiply.
#5x=2*1#
Simplify.
#5x=2#
Divide each side by five to find the value of x.
#x=2/5#
#2/5# or #0.4# cups of flour are needed.

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