Kenneth S. answered 04/17/16
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If I need two thirds of a cup of water for every three fourths of a cup of mix, how much water do I need for one cup of mix?
for ¾ c of mix you need 2/3 c of water
Multiply both parts of the above fact by 4/3;
so for 1 c of mix you need (4/3)(2/3) c of water, that is, 8/9 cup of water.