In a canteen,
47 of the girls wore caps. After 60 girls who wore caps entered the canteen, the percentage of girls who wore caps increased to 75%. How many girls in the canteen did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
4x1 = 4 u |
3x1 = 3 u |
Change |
+ 60 |
|
After |
3x3 = 9 u |
1x3 = 3 u |
75% =
75100 =
34The number of girls who did not wear caps remains unchanged. LCM of 3 and 1 is 3.
Number of girls who wore caps and left
= 9 u - 4 u
= 5 u
5 u = 60
1 u = 60 ÷ 5 = 12
Number of girls who did not wear caps
= 3 u
= 3 x 12
= 36
Answer(s): 36