SAT Mathematics Practice Test 2

If 43% of the money earned is used to pay for costs, then the rest,57%, is profit. A performance where 8 people attend earns the performer120, and 57% of 120 is 120×0.57=68.40.
Choice A is incorrect. The amount 51.60 is 43% of the money earned from a performance where 8 people attend, which is the cost of putting on the performance, not the profit from the performance. Choice B is incorrect. It is given that 57% of the money earned is profit, but 57% of 120 is not equal to 57.00. Choice D is incorrect. The profit can be found by subtracting 43%of 120 from 120, but 43% of 120 is 51.60, not 43.00. Thus, the profit is 120−51.60=68.40, not 120−43.00=77.00.