In a parade square,
49 of the students wore caps. After 93 students who wore caps left the parade square, the percentage of students who wore caps decreased to 10%. How many students in the parade square did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
4x9 = 36 u |
5x9 = 45 u |
Change |
- 93 |
|
After |
1x5 = 5 u |
9x5 = 45 u |
10% =
10100 =
110The number of students who did not wear caps remains unchanged. LCM of 5 and 9 is 45.
Number of students who wore caps and left
= 36 u - 5 u
= 31 u
31 u = 93
1 u = 93 ÷ 31 = 3
Number of students who did not wear caps
= 45 u
= 45 x 3
= 135
Answer(s): 135