In a basketball court,
12 of the girls wore sweaters. After 32 girls who wore sweaters entered the basketball court, the percentage of girls who wore sweaters increased to 70%. How many girls in the basketball court did not wear sweaters?
| |
Wore sweaters |
Did not wear sweaters |
| Before |
1x3 =
3 u |
1x3 =
3 u |
| Change |
+ 32 |
|
| After |
7x1 =
7 u |
3x1 =
3 u |
70% =
70100 =
710The number of girls who did not wear sweaters remains unchanged. LCM of 1 and 3 is 3.
Number of girls who wore sweaters and left
= 7 u - 3 u
= 4 u
4 u = 32
1 u = 32 ÷ 4 = 8
Number of girls who did not wear sweaters
= 3 u
= 3 x 8
= 24
Answer(s): 24
