Let n = the number of questions out of 130 that need to be answered correctly to make a score of 80%.n/130 = 80%n/130 = 80/100n/130 = .80130(n/130)= 130(.80)(130/130)n = 130(.80)(1)n = 104n = 104CHECK:n/130 = 80%104/130 = 80%.80 = 80%80/100 = 80%80% = 80%Therefore, n = 104 questions out of 130 is indeed the number that needs to be answered correctly to make a score of 80%.