Last year, there were 80 members in a school concert club. The number of girls was
35 the number of boys.
- What percentage of the members were girls last year?
- This year, 6 boys left the club and 14 girls joined the club. What percentage of the members are girls this year?
(a)
Girls : Boys : Total
3 : 5 : 8
Percentage of members that were girls
=
38 x 100%
= 37.5%
(b)
|
Girls |
Boys |
Before |
3 u |
5 u |
Change |
+ 14 |
- 6 |
After |
3 u + 14 |
5 u - 6 |
8 u = 80
1 u = 80 ÷ 8 = 10
Number of girls this year
= 3 u + 14
= (3 x 10) + 14
= 30 + 14
= 44
Total members this year
= 80 + 14 - 6
= 88
Percentage of girls in the club
=
4488 x 100%
= 50%
Answer(s): (a) 37.5%; (b) 50%