Question

The percentage score on a test varies directly as the number of correct responses. Stan answered 29 questions correctly and earned a score of 87. What would Stan's percentage score have been if he had answered 25 questions correctly?

Answer 1

87 / 29 = x / 25.....score 87 to 29 answers = score x to 25 answers
cross multiply because this is a proportion
(29)(x) = (25)(87)
29x = 2175
x = 2175/29
x = 75 <=== Stan's percentage score when answering 25 q's correctly