In a tuckshop,
78 of the children wore sweaters. After 99 children who wore sweaters left the tuckshop, the percentage of children who wore sweaters decreased to 60%. How many children in the tuckshop did not wear sweaters?
|
Wore sweaters |
Did not wear sweaters |
Before |
7x2 = 14 u |
1x2 = 2 u |
Change |
- 99 |
|
After |
3x1 = 3 u |
2x1 = 2 u |
60% =
60100 =
35The number of children who did not wear sweaters remains unchanged. LCM of 1 and 2 is 2.
Number of children who wore sweaters and left
= 14 u - 3 u
= 11 u
11 u = 99
1 u = 99 ÷ 11 = 9
Number of children who did not wear sweaters
= 2 u
= 2 x 9
= 18
Answer(s): 18