In a canteen,
67 of the boys wore sweaters. After 184 boys who wore sweaters left the canteen, the percentage of boys who wore sweaters decreased to 20%. How many boys in the canteen did not wear sweaters?
| |
Wore sweaters |
Did not wear sweaters |
| Before |
6x4 =
24 u |
1x4 =
4 u |
| Change |
- 184 |
|
| After |
1x1 =
1 u |
4x1 =
4 u |
20% =
20100 =
15The number of boys who did not wear sweaters remains unchanged. LCM of 1 and 4 is 4.
Number of boys who wore sweaters and left
= 24 u - 1 u
= 23 u
23 u = 184
1 u = 184 ÷ 23 = 8
Number of boys who did not wear sweaters
= 4 u
= 4 x 8
= 32
Answer(s): 32
