In a parade square,
49 of the children wore caps. After 99 children who wore caps entered the parade square, the percentage of children who wore caps increased to 75%. How many children in the parade square did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
4x1 = 4 u |
5x1 = 5 u |
Change |
+ 99 |
|
After |
3x5 = 15 u |
1x5 = 5 u |
75% =
75100 =
34The number of children who did not wear caps remains unchanged. LCM of 5 and 1 is 5.
Number of children who wore caps and left
= 15 u - 4 u
= 11 u
11 u = 99
1 u = 99 ÷ 11 = 9
Number of children who did not wear caps
= 5 u
= 5 x 9
= 45
Answer(s): 45