Last year, there were 56 members in a school musical play club. The number of boys was
17 the number of girls.
- What percentage of the members were boys last year?
- This year, 10 girls left the club and 14 boys joined the club. What percentage of the members are boys this year?
(a)
Boys : Girls : Total
1 : 7 : 8
Percentage of members that were boys
=
18 x 100%
= 12.5%
(b)
|
Boys |
Girls |
Before |
1 u |
7 u |
Change |
+ 14 |
- 10 |
After |
1 u + 14 |
7 u - 10 |
8 u = 56
1 u = 56 ÷ 8 = 7
Number of boys this year
= 1 u + 14
= (1 x 7) + 14
= 7 + 14
= 21
Total members this year
= 56 + 14 - 10
= 60
Percentage of boys in the club
=
2160 x 100%
= 35%
Answer(s): (a) 12.5%; (b) 35%