In a basketball court,
58 of the boys wore scarves. After 112 boys who wore scarves left the basketball court, the percentage of boys who wore scarves decreased to 45%. How many boys in the basketball court did not wear scarves?
|
Wore scarves |
Did not wear scarves |
Before |
5x11 = 55 u |
3x11 = 33 u |
Change |
- 112 |
|
After |
9x3 = 27 u |
11x3 = 33 u |
45% =
45100 =
920The number of boys who did not wear scarves remains unchanged. LCM of 3 and 11 is 33.
Number of boys who wore scarves and left
= 55 u - 27 u
= 28 u
28 u = 112
1 u = 112 ÷ 28 = 4
Number of boys who did not wear scarves
= 33 u
= 33 x 4
= 132
Answer(s): 132