Haines debate team

Question

The Haines Debate Team had 40 members. Of those, 2/5 were 6th graders. After the first quarter, 20 new members joined the team, but 6th graders still made up 2/5 of the total members. How many new members were 6th graders?

Answer 1

40 * 2/5 = 16 6th graders

(16+x)/60 = 2/5

5(x+16) = 120

5x + 80 = 120

5x = 40

x = 8

16/40 = 8/20 = 4/10 = 2/5 = 0.4 = 40%

24/60 = 12/30 = 6/15 = 2/5 = 40%

8 new 6th graders