In a hall,
19 of the girls wore caps. After 69 girls who wore caps entered the hall, the percentage of girls who wore caps increased to 75%. How many girls in the hall did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
1x1 = 1 u |
8x1 = 8 u |
Change |
+ 69 |
|
After |
3x8 = 24 u |
1x8 = 8 u |
75% =
75100 =
34The number of girls who did not wear caps remains unchanged. LCM of 8 and 1 is 8.
Number of girls who wore caps and left
= 24 u - 1 u
= 23 u
23 u = 69
1 u = 69 ÷ 23 = 3
Number of girls who did not wear caps
= 8 u
= 8 x 3
= 24
Answer(s): 24