In a tuckshop,
17 of the children wore spectacles. After 253 children who wore spectacles entered the tuckshop, the percentage of children who wore spectacles increased to 80%. How many children in the tuckshop did not wear spectacles?
|
Wore spectacles |
Did not wear spectacles |
Before |
1x1 = 1 u |
6x1 = 6 u |
Change |
+ 253 |
|
After |
4x6 = 24 u |
1x6 = 6 u |
80% =
80100 =
45The number of children who did not wear spectacles remains unchanged. LCM of 6 and 1 is 6.
Number of children who wore spectacles and left
= 24 u - 1 u
= 23 u
23 u = 253
1 u = 253 ÷ 23 = 11
Number of children who did not wear spectacles
= 6 u
= 6 x 11
= 66
Answer(s): 66