In a school field,
45 of the pupils wore sweaters. After 385 pupils who wore sweaters left the school field, the percentage of pupils who wore sweaters decreased to 45%. How many pupils in the school field did not wear sweaters?
|
Wore sweaters |
Did not wear sweaters |
Before |
4x11 = 44 u |
1x11 = 11 u |
Change |
- 385 |
|
After |
9x1 = 9 u |
11x1 = 11 u |
45% =
45100 =
920The number of pupils who did not wear sweaters remains unchanged. LCM of 1 and 11 is 11.
Number of pupils who wore sweaters and left
= 44 u - 9 u
= 35 u
35 u = 385
1 u = 385 ÷ 35 = 11
Number of pupils who did not wear sweaters
= 11 u
= 11 x 11
= 121
Answer(s): 121