Question

Thirty one percent of students at IS2 are 6th graders. What percent of students at IS2 are 7th and 8th graders?

Answer 1

Sixty-nine percent.

Explanation:

The total student population of sixth, seventh and eighth grade studentes corresponds to 100%

6th grade ⇒ 31%

Then:

100% - 31% = 69%

7th grade + 8th grade = 69%

Answer 2

69% are 7th and 8th graders
Hope this helps