In a basketball court,
58 of the students wore cardigans. After 242 students who wore cardigans entered the basketball court, the percentage of students who wore cardigans increased to 90%. How many students in the basketball court did not wear cardigans?
| |
Wore cardigans |
Did not wear cardigans |
| Before |
5x1 =
5 u |
3x1 =
3 u |
| Change |
+ 242 |
|
| After |
9x3 =
27 u |
1x3 =
3 u |
90% =
90100 =
910The number of students who did not wear cardigans remains unchanged. LCM of 3 and 1 is 3.
Number of students who wore cardigans and left
= 27 u - 5 u
= 22 u
22 u = 242
1 u = 242 ÷ 22 = 11
Number of students who did not wear cardigans
= 3 u
= 3 x 11
= 33
Answer(s): 33
