In a basketball court,
27 of the children wore cardigans. After 216 children who wore cardigans entered the basketball court, the percentage of children who wore cardigans increased to 80%. How many children in the basketball court did not wear cardigans?
|
Wore cardigans |
Did not wear cardigans |
Before |
2x1 = 2 u |
5x1 = 5 u |
Change |
+ 216 |
|
After |
4x5 = 20 u |
1x5 = 5 u |
80% =
80100 =
45The number of children who did not wear cardigans remains unchanged. LCM of 5 and 1 is 5.
Number of children who wore cardigans and left
= 20 u - 2 u
= 18 u
18 u = 216
1 u = 216 ÷ 18 = 12
Number of children who did not wear cardigans
= 5 u
= 5 x 12
= 60
Answer(s): 60