In a tuckshop,
78 of the children wore sweaters. After 460 children who wore sweaters left the tuckshop, the percentage of children who wore sweaters decreased to 30%. How many children in the tuckshop did not wear sweaters?
| |
Wore sweaters |
Did not wear sweaters |
| Before |
7x7 =
49 u |
1x7 =
7 u |
| Change |
- 460 |
|
| After |
3x1 =
3 u |
7x1 =
7 u |
30% =
30100 =
310The number of children who did not wear sweaters remains unchanged. LCM of 1 and 7 is 7.
Number of children who wore sweaters and left
= 49 u - 3 u
= 46 u
46 u = 460
1 u = 460 ÷ 46 = 10
Number of children who did not wear sweaters
= 7 u
= 7 x 10
= 70
Answer(s): 70
