In a basketball court,
49 of the students wore ties. After 44 students who wore ties left the basketball court, the percentage of students who wore ties decreased to 20%. How many students in the basketball court did not wear ties?
| |
Wore ties |
Did not wear ties |
| Before |
4x4 =
16 u |
5x4 =
20 u |
| Change |
- 44 |
|
| After |
1x5 =
5 u |
4x5 =
20 u |
20% =
20100 =
15The number of students who did not wear ties remains unchanged. LCM of 5 and 4 is 20.
Number of students who wore ties and left
= 16 u - 5 u
= 11 u
11 u = 44
1 u = 44 ÷ 11 = 4
Number of students who did not wear ties
= 20 u
= 20 x 4
= 80
Answer(s): 80
