In a tuckshop,
15 of the girls wore caps. After 50 girls who wore caps left the tuckshop, the percentage of girls who wore caps decreased to 10%. How many girls in the tuckshop did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
1x9 = 9 u |
4x9 = 36 u |
Change |
- 50 |
|
After |
1x4 = 4 u |
9x4 = 36 u |
10% =
10100 =
110The number of girls who did not wear caps remains unchanged. LCM of 4 and 9 is 36.
Number of girls who wore caps and left
= 9 u - 4 u
= 5 u
5 u = 50
1 u = 50 ÷ 5 = 10
Number of girls who did not wear caps
= 36 u
= 36 x 10
= 360
Answer(s): 360