In a basketball court,
47 of the students wore scarves. After 85 students who wore scarves left the basketball court, the percentage of students who wore scarves decreased to 45%. How many students in the basketball court did not wear scarves?
|
Wore scarves |
Did not wear scarves |
Before |
4x11 = 44 u |
3x11 = 33 u |
Change |
- 85 |
|
After |
9x3 = 27 u |
11x3 = 33 u |
45% =
45100 =
920The number of students who did not wear scarves remains unchanged. LCM of 3 and 11 is 33.
Number of students who wore scarves and left
= 44 u - 27 u
= 17 u
17 u = 85
1 u = 85 ÷ 17 = 5
Number of students who did not wear scarves
= 33 u
= 33 x 5
= 165
Answer(s): 165