In a basketball court,
38 of the children wore scarves. After 48 children who wore scarves entered the basketball court, the percentage of children who wore scarves increased to 75%. How many children in the basketball court did not wear scarves?
| |
Wore scarves |
Did not wear scarves |
| Before |
3x1 =
3 u |
5x1 =
5 u |
| Change |
+ 48 |
|
| After |
3x5 =
15 u |
1x5 =
5 u |
75% =
75100 =
34The number of children who did not wear scarves remains unchanged. LCM of 5 and 1 is 5.
Number of children who wore scarves and left
= 15 u - 3 u
= 12 u
12 u = 48
1 u = 48 ÷ 12 = 4
Number of children who did not wear scarves
= 5 u
= 5 x 4
= 20
Answer(s): 20
