Question

7. In his History class, Derek failed the first test of the semester. His score was 56. Derek's History teacher allowed him to take a make-up test. Derek spent a lot of time studying and he scored 72 on the make-up test. What was the percent increase in Derek's test score? THE ANSWER IS 27% BUT I DONT KNOW HOW TO GET IT IF THAT MAKES SENSE​

Answer 1

Answer: 28.6%

Explanation:

56*0.285714285714 = 16

56 + 16 = 72

Multiple that 0.285714285714 by 100 to get your percentage increase (28.6%)

Answer 2

Initial result: 56

Make-up result: 72

Percentage increase: 27%

Explanation:
72-56/56 x 100

16/56 x 100

0.285714285714286 x 100

28.57142857142857%

28.57% x 56 = 15.99

15.99 rounded off to a whole number = 16

16 + 56 = 72