Question

Jessica started spending more time on

her math homework, and as a result
her average grade increased from an
82 to an 88 over a 3-week period. To
the nearest tenth of a percent, what
was the percent increase in her
average gade over the 3-week
period
A 93.1%
B 7.3%
C 6.8%
D 6.0%

Answer 1

B. 7.3 %

Explanation:

Given:

Initial average grade = 82

Final average grade = 88

Duration for the increase = 3 weeks

Therefore, increase in average grade = Final - Initial = 88 - 82 = 6

Now, percent increase in average grade is given as:

`\% \textrm{increase}=\frac{\textrm{Increase}}{\textrm{Initial grade}}* 100\\\% \textrm{increase}=(6)/(82)* 100\\\% \textrm{increase}=(600)/(82)=7.3\%`

Therefore, the percent increase in her average grade over the 3-week period is 7.3 %.