Question

Recipe for 1lb of trail mix calls for 3.2 oz of cashews. How many ounces of cashews are needed to make 4lb of trail mix

Answer 1

$\frac{1}{4}$ = $\frac{3.2}{x}$

Cross multiply..

1x = 12.8
Divide 1 from both sides

$\frac{1x}{1}$ = $\frac{12.8}{1}$

x = 12.8
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Let's check our answer now..

$\frac{1}{4}$ = $\frac{3.2}{12.8}$

Cross multiply

12.8 = 12.8

Your answer is 12.8 :)