If bulk candy costs $4.00 a pound, how much will 10 ounces cost? (There are 16 ounces in a pound.)
What will be an ideal response?
Let x equal what you are trying to find
x = ($ purchase) Note: The unit "purchase" is made up.
Reciprocal factors
16 (oz / lb) 1 / 16 (lb / oz)
4 ($ / lb) 1/4 (lb / $)
Build an equation
x ($ / purchase) = 4.00 ($ / lb) * 1 / 16 (lb / ez) * 10 (e-z / purchase)
Multiply factors
x ($ / purchase) = 2.50 ($ / purchase) Cost of purchase of 10 oz is $2.50.
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