Last year, there were 192 members in a school circus show club. The number of girls was
13 the number of boys.
- What percentage of the members were girls last year?
- This year, 2 boys left the club and 10 girls joined the club. What percentage of the members are girls this year?
(a)
Girls : Boys : Total
1 : 3 : 4
Percentage of members that were girls
=
14 x 100%
= 25%
(b)
|
Girls |
Boys |
Before |
1 u |
3 u |
Change |
+ 10 |
- 2 |
After |
1 u + 10 |
3 u - 2 |
4 u = 192
1 u = 192 ÷ 4 = 48
Number of girls this year
= 1 u + 10
= (1 x 48) + 10
= 48 + 10
= 58
Total members this year
= 192 + 10 - 2
= 200
Percentage of girls in the club
=
58200 x 100%
= 29%
Answer(s): (a) 25%; (b) 29%