Last year, there were 40 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, 4 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 |
- 4 |
After |
1 u + 14 |
7 u - 4 |
8 u = 40
1 u = 40 ÷ 8 = 5
Number of boys this year
= 1 u + 14
= (1 x 5) + 14
= 5 + 14
= 19
Total members this year
= 40 + 14 - 4
= 50
Percentage of boys in the club
=
1950 x 100%
= 38%
Answer(s): (a) 12.5%; (b) 38%