In a canteen,
67 of the children wore sweaters. After 136 children who wore sweaters left the canteen, the percentage of children who wore sweaters decreased to 25%. How many children in the canteen did not wear sweaters?
| |
Wore sweaters |
Did not wear sweaters |
| Before |
6x3 =
18 u |
1x3 =
3 u |
| Change |
- 136 |
|
| After |
1x1 =
1 u |
3x1 =
3 u |
25% =
25100 =
14The number of children who did not wear sweaters remains unchanged. LCM of 1 and 3 is 3.
Number of children who wore sweaters and left
= 18 u - 1 u
= 17 u
17 u = 136
1 u = 136 ÷ 17 = 8
Number of children who did not wear sweaters
= 3 u
= 3 x 8
= 24
Answer(s): 24
