In a tuckshop,
16 of the children wore cardigans. After 256 children who wore cardigans entered the tuckshop, the percentage of children who wore cardigans increased to 70%. How many children in the tuckshop did not wear cardigans?
| |
Wore cardigans |
Did not wear cardigans |
| Before |
1x3 =
3 u |
5x3 =
15 u |
| Change |
+ 256 |
|
| After |
7x5 =
35 u |
3x5 =
15 u |
70% =
70100 =
710The number of children who did not wear cardigans remains unchanged. LCM of 5 and 3 is 15.
Number of children who wore cardigans and left
= 35 u - 3 u
= 32 u
32 u = 256
1 u = 256 ÷ 32 = 8
Number of children who did not wear cardigans
= 15 u
= 15 x 8
= 120
Answer(s): 120
