Last year, there were 88 members in a school concert club. The number of boys was
35 the number of girls.
- What percentage of the members were boys last year?
- This year, 8 girls left the club and 14 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 |
+ 14 |
- 8 |
After |
3 u + 14 |
5 u - 8 |
8 u = 88
1 u = 88 ÷ 8 = 11
Number of boys this year
= 3 u + 14
= (3 x 11) + 14
= 33 + 14
= 47
Total members this year
= 88 + 14 - 8
= 94
Percentage of boys in the club
=
4794 x 100%
= 50%
Answer(s): (a) 37.5%; (b) 50%