Sarah wants to raise her math grade to a 98 to improve her chances of winning a math scholarship. Her math average for the last marking period was an 85. By what
percentage of points must Sarah raise her grade to earn a 98? No, the answer is not
13%.
approximately 15%
approximately 14%
approximately 13%
approximately 12%

approximately 15%

Step-by-step explanation:

What we know:

Sarah wants to raise her math grade to a 98.

Her grade is currently an 85 in math.

Subtract 85 from 98, and put the difference over 85.

(98-85)/85

13/85

Does it need to be simplified? 13 is prime so no.

13/85 equals (rounded to nearest 10,000th) 15.2941%, so Sarah must raise her grade by approximately 15% to improve her math scholarship chances.