In a parade square,
34 of the students wore vests. After 264 students who wore vests left the parade square, the percentage of students who wore vests decreased to 45%. How many students in the parade square did not wear vests?
| |
Wore vests |
Did not wear vests |
| Before |
3x11 =
33 u |
1x11 =
11 u |
| Change |
- 264 |
|
| After |
9x1 =
9 u |
11x1 =
11 u |
45% =
45100 =
920The number of students who did not wear vests remains unchanged. LCM of 1 and 11 is 11.
Number of students who wore vests and left
= 33 u - 9 u
= 24 u
24 u = 264
1 u = 264 ÷ 24 = 11
Number of students who did not wear vests
= 11 u
= 11 x 11
= 121
Answer(s): 121
