car A costs 20 percent less than car B. Car B costs twice as much as Car C. The cost of Car C is what percent of the cost of Car A?

How do I set up this question? What should the process of thinking be for these questions?

2 answers

A = B - 20 % B = B - 0.2 B = 0.8 B

A = 0.8 B Divide both sides by 0.8

A / 0. 8 = 0.8 B / 0.8

1.25 A = B

B = 1.25 A

B = 2 C Divide both sides by 2

B / 2 = C

C = B / 2

C = 1.25 A / 2

C = 0.625 A = 0.625 A * 100 /100 = 62.5 % A
Thank you! But does this have anything to do with ratios?