In a tuckshop,
23 of the students wore caps. After 153 students who wore caps left the tuckshop, the percentage of students who wore caps decreased to 10%. How many students in the tuckshop did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
2x9 = 18 u |
1x9 = 9 u |
Change |
- 153 |
|
After |
1x1 = 1 u |
9x1 = 9 u |
10% =
10100 =
110The number of students who did not wear caps remains unchanged. LCM of 1 and 9 is 9.
Number of students who wore caps and left
= 18 u - 1 u
= 17 u
17 u = 153
1 u = 153 ÷ 17 = 9
Number of students who did not wear caps
= 9 u
= 9 x 9
= 81
Answer(s): 81