In a tuckshop,
23 of the children wore scarves. After 78 children who wore scarves left the tuckshop, the percentage of children who wore scarves decreased to 45%. How many children in the tuckshop did not wear scarves?
| |
Wore scarves |
Did not wear scarves |
| Before |
2x11 =
22 u |
1x11 =
11 u |
| Change |
- 78 |
|
| After |
9x1 =
9 u |
11x1 =
11 u |
45% =
45100 =
920The number of children who did not wear scarves remains unchanged. LCM of 1 and 11 is 11.
Number of children who wore scarves and left
= 22 u - 9 u
= 13 u
13 u = 78
1 u = 78 ÷ 13 = 6
Number of children who did not wear scarves
= 11 u
= 11 x 6
= 66
Answer(s): 66
