Last year, there were 72 members in a school musical play club. The number of boys was
35 the number of girls.
- What percentage of the members were boys last year?
- This year, 6 girls left the club and 9 boys joined the club. What percentage of the members are boys this year?
(a)
Boys : Girls : Total
3 : 5 : 8
Percentage of members that were boys
=
38 x 100%
= 37.5%
(b)
|
Boys |
Girls |
Before |
3 u |
5 u |
Change |
+ 9 |
- 6 |
After |
3 u + 9 |
5 u - 6 |
8 u = 72
1 u = 72 ÷ 8 = 9
Number of boys this year
= 3 u + 9
= (3 x 9) + 9
= 27 + 9
= 36
Total members this year
= 72 + 9 - 6
= 75
Percentage of boys in the club
=
3675 x 100%
= 48%
Answer(s): (a) 37.5%; (b) 48%