Question

Erin wants to raise her math grade to a 90 to improve her chances of winning a math scholarship. Her math average for the last marking period was an 75. What is the percent increase that Erin needs to improve her grade?​

Answer 1

20%

Explanation:

She needs to improve her average by the difference between her 2 grades

That difference is 15 points and is a 20% increase

Using the fromula for increase/ initial value x 100= new %

so (90-75)/75 x 100 = 15/75 x 100 which is then equal to 20%