Percentage Rate Base | Civil Service Exam | part3 of 3

11.) 25% of what number is 12.5% of 520? 12.) 350% of what number is 6.25% of 784? 13.) 4.5% of what number is 225% of 80? 14.) 1/5% of what number is 550% of 14? 15.) 33 1/3% of what number is 66 2/3% of 594? Part1:    • Percentage Rate Base | Civil Service Exam ...   Part2:    • Percentage Rate Base | Civil Service Exam ...