Wanda's homework was to find 73% of $400 A tape diagram. 0 dollars is 0 percent. Question mark dollars is 73 percent. 400 dollars is 100 percent. (7.3) (400) = 2,920. 73 percent of 400 dollars is 2,920 dollars. What error did Wanda make? None. Wanda’s work is correct. Wanda converted the percent to a decimal incorrectly. It should be 0.073. Wanda converted the percent to a decimal incorrectly. It should be 0.73. Wanda has the wrong label. It should be hours, not dollars.