Doubling the recipe for a chocolate cake. The cake requires 2 3/4 cups of flour and 1 1/3 cup of sugar. how much flour and how much sugar will be needed?

1 Answer
May 24, 2018

Flour #= 5 1/2 \ "cups"#

Sugar #= 2 2/3 \ "cups"#

Explanation:

If you transfer these fractions into mixed fractions, you get

#2 3/4 = (2 xx 4 + 3)/4 = 11/4#

for flour and

#1 1/3 = (1 xx 3 + 1)/3 = 4/3#

for sugar, which then must be doubled, so you get

#11/4 xx 2 = 22/4 -># flour

and

#4/3 xx 2 = 8/3 -># sugar

which translates to #5 1/2# flour and #2 2/3# sugar.