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?
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)