In a basketball court,
67 of the students wore scarves. After 429 students who wore scarves left the basketball court, the percentage of students who wore scarves decreased to 30%. How many students in the basketball court did not wear scarves?
|
Wore scarves |
Did not wear scarves |
Before |
6x7 = 42 u |
1x7 = 7 u |
Change |
- 429 |
|
After |
3x1 = 3 u |
7x1 = 7 u |
30% =
30100 =
310The number of students who did not wear scarves remains unchanged. LCM of 1 and 7 is 7.
Number of students who wore scarves and left
= 42 u - 3 u
= 39 u
39 u = 429
1 u = 429 ÷ 39 = 11
Number of students who did not wear scarves
= 7 u
= 7 x 11
= 77
Answer(s): 77