Last year, there were 56 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, 4 girls left the club and 10 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 |
+ 10 |
- 4 |
After |
3 u + 10 |
5 u - 4 |
8 u = 56
1 u = 56 ÷ 8 = 7
Number of boys this year
= 3 u + 10
= (3 x 7) + 10
= 21 + 10
= 31
Total members this year
= 56 + 10 - 4
= 62
Percentage of boys in the club
=
3162 x 100%
= 50%
Answer(s): (a) 37.5%; (b) 50%