Question

5 points10) Some sixth-, seventh-, and eighth-grade students spend time at theelementary school tutoring students. Of the students who tutor, 12 aresixth-graders, 18 are seventh-graders, and 6 are eighth-graders. Whatpercent of tutors are seventh-graders? *18%36%50%75%

Answer 1

50%

1) Gathering the data

12 are 6th graders

18 7th graders

6 8th graders

2) Let's add them up at first to get the whole number of students who tutor:

12 +18 +6 = 24 +12 = 36

So we can say that

36 -------------- 100%

The 7th graders: 18 students

So we can write a proportion for that

36-------100%

18 ------- x

36x = 1800 Divide both sides by 36

x =50

3) So the answer is 50% of them are 7th graders.