In a canteen,
14 of the boys wore sweaters. After 6 boys who wore sweaters left the canteen, the percentage of boys who wore sweaters decreased to 10%. How many boys in the canteen did not wear sweaters?
|
Wore sweaters |
Did not wear sweaters |
Before |
1x3 = 3 u |
3x3 = 9 u |
Change |
- 6 |
|
After |
1x1 = 1 u |
9x1 = 9 u |
10% =
10100 =
110The number of boys who did not wear sweaters remains unchanged. LCM of 3 and 9 is 9.
Number of boys who wore sweaters and left
= 3 u - 1 u
= 2 u
2 u = 6
1 u = 6 ÷ 2 = 3
Number of boys who did not wear sweaters
= 9 u
= 9 x 3
= 27
Answer(s): 27