Sandra needs 4 1/4 cups of flour for one kind of cookie and 3 1/8 cups for another kind. How much would she need for both kinds?

1 Answer
Dec 14, 2016

Answer:

#59/8# or #7 3/8# cups.

Explanation:

To solve this we must add: #4 1/4 + 3 1/8#

First, we must convert the Mixed Fractions to Improper Fractions. To do this we must multiply each integer by the appropriate form of #1# and then add this to the fraction:

#((4/4xx 4) + 1/4) + ((8/8 xx 3) + 1/8)#

#(16/4 + 1/4) + (24/8 + 1/8)#

#17/4 + 25/8#

Next we must get each equation over a common denominator (in this case 8) by multiply the fraction by the appropriate form of #1# so we can add the fractions:

#(2/2 xx 17/4) + 25/8#

#34/8 + 25/8#

#(34 + 25)/8#

#59/8#

or

#(56 + 3)/8#

#56/8 + 3/8#

#7 + 3/8#

#7 3/8#