Question

roberto made a 74 on last weeks math quiz. this week he made an 85 on the quiz. which best describes the percent of increase in his score

Answer 1

The percentage of increase in Roberto score is 14.87%, if Roberto made a 74 on last weeks math quiz. this week he made an 85 on the quiz.

Step-by-step explanation:

The given is,

               Roberto score on math quiz at last week is 74

               This week he made an 85 on the quiz

Step:1

            Formula to calculate the percentage of increase the score,

                  $Percentage of increase = \frac{Final score-Starting score}{Starting score}$ × 100...........(1)

            From the given,

                  Final score = 85

                  Starting score = 74

           Equation (1) becomes,

                  $Percentage of increase =( \frac{85-74}{74})$ ×  100

                                                       = $(\frac{11}{74})$ ×  100

                                                       = 0.1486486  ×  100

                                                       = 14.86486 %

                                                      ≅ 14.87 %

              Percentage of increase = 14.87 %

Result:

        The percentage of increase in Roberto score is 14.87%, if Roberto made a 74 on last weeks math quiz. this week he made an 85 on the quiz.