In a school field,
56 of the boys wore caps. After 126 boys who wore caps left the school field, the percentage of boys who wore caps decreased to 25%. How many boys in the school field did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
5x3 = 15 u |
1x3 = 3 u |
Change |
- 126 |
|
After |
1x1 = 1 u |
3x1 = 3 u |
25% =
25100 =
14The number of boys who did not wear caps remains unchanged. LCM of 1 and 3 is 3.
Number of boys who wore caps and left
= 15 u - 1 u
= 14 u
14 u = 126
1 u = 126 ÷ 14 = 9
Number of boys who did not wear caps
= 3 u
= 3 x 9
= 27
Answer(s): 27