I am doing recipe food cost and I am confused on the conversions

Question

if I need 1/2 cup of blueberries and it is 3.74 for 10oz. How would I do the conversion step by step.

Answer 1

Unfortunately, the problem doesn't give conversion ratios. There is an old expression, "a pint's a pound the world around". A pint is two cups, so one cup is half a pound, or 8 ounces. Then 1/2 cup is 4 ounces. I assume that 3.74 is in dollars. Then the fractions are (3.74/10) = x/4. Cross-multiplying, we have x = 4 x 3.74/10 = 1.4967, or $1.50.