Question

A jar of crunchy peanut butter contains 1.37 kg of peanut butter. if you use 7.0 % of the peanut butter for a sandwich, how many ounces of peanut butter did you take out of the container?

Answer 1

0.07 × 1.37 kg × (35.274 oz/kg) ≈ 3.38 oz

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The exact conversion is 0.028349523125 kg/oz. The number above is a rounded version of the reciprocal of this factor.