In a hall,
78 of the students wore caps. After 682 students who wore caps left the hall, the percentage of students who wore caps decreased to 10%. How many students in the hall did not wear caps?
|
Wore caps |
Did not wear caps |
Before |
7x9 = 63 u |
1x9 = 9 u |
Change |
- 682 |
|
After |
1x1 = 1 u |
9x1 = 9 u |
10% =
10100 =
110The number of students who did not wear caps remains unchanged. LCM of 1 and 9 is 9.
Number of students who wore caps and left
= 63 u - 1 u
= 62 u
62 u = 682
1 u = 682 ÷ 62 = 11
Number of students who did not wear caps
= 9 u
= 9 x 11
= 99
Answer(s): 99