A baker mixes a 21-pound batch of dough that contains 3 pounds of sugar. Approximately how many pounds of sugar must be added for the dough to contain 27% sugar?

A. 2.7 B. 3.1 C. 3.6 D. 4.2

The answer is c. 3.6

3.6 + 3 = 6.6 pounds of sugar

6.6-3 = 3.6 pounds of sugar added to the dough. This weight that must be added to the total weight of the dough.

3.6 (new sugar) + 21 (original dough weight) = 24.6 (total weight)

6.6/24.6 = 26.8%