In a tuckshop,
27 of the children wore cardigans. After 430 children who wore cardigans entered the tuckshop, the percentage of children who wore cardigans increased to 90%. How many children in the tuckshop did not wear cardigans?
| |
Wore cardigans |
Did not wear cardigans |
| Before |
2x1 =
2 u |
5x1 =
5 u |
| Change |
+ 430 |
|
| After |
9x5 =
45 u |
1x5 =
5 u |
90% =
90100 =
910The number of children who did not wear cardigans remains unchanged. LCM of 5 and 1 is 5.
Number of children who wore cardigans and left
= 45 u - 2 u
= 43 u
43 u = 430
1 u = 430 ÷ 43 = 10
Number of children who did not wear cardigans
= 5 u
= 5 x 10
= 50
Answer(s): 50
