In a parade square,
38 of the girls wore caps. After 14 girls who wore caps left the parade square, the percentage of girls who wore caps decreased to 20%. How many girls in the parade square did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
3x4 = 12 u |
5x4 = 20 u |
Change |
- 14 |
|
After |
1x5 = 5 u |
4x5 = 20 u |
20% =
20100 =
15The number of girls who did not wear caps remains unchanged. LCM of 5 and 4 is 20.
Number of girls who wore caps and left
= 12 u - 5 u
= 7 u
7 u = 14
1 u = 14 ÷ 7 = 2
Number of girls who did not wear caps
= 20 u
= 20 x 2
= 40
Answer(s): 40