In a school field,
29 of the boys wore caps. After 68 boys who wore caps entered the school field, the percentage of boys who wore caps increased to 60%. How many boys in the school field did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
2x2 = 4 u |
7x2 = 14 u |
Change |
+ 68 |
|
After |
3x7 = 21 u |
2x7 = 14 u |
60% =
60100 =
35The number of boys who did not wear caps remains unchanged. LCM of 7 and 2 is 14.
Number of boys who wore caps and left
= 21 u - 4 u
= 17 u
17 u = 68
1 u = 68 ÷ 17 = 4
Number of boys who did not wear caps
= 14 u
= 14 x 4
= 56
Answer(s): 56