Question

Aldo's chocolate bar is 61% cocoa. If the weight of the chocolate bar is 91 grams, how many grams of cocoa does it contain? Round your answer to the nearesttenth

Answer 1

It contains 55.5 grams of cocoa.

Explanation:

This question can be solved using a rule of three.

The weight of the chocolate bar, which is of 91 grams, is 100% = 1. We have that it is 61% = 0.61 of cocoa. How many grams of cocoa are there?

91 grams - 1

x grams - 0.61

Applying cross multiplication

x = 91*0.61 = 55.5

It contains 55.5 grams of cocoa.