In a parade square,
16 of the students wore sweaters. After 96 students who wore sweaters entered the parade square, the percentage of students who wore sweaters increased to 70%. How many students in the parade square did not wear sweaters?
| |
Wore sweaters |
Did not wear sweaters |
| Before |
1x3 =
3 u |
5x3 =
15 u |
| Change |
+ 96 |
|
| After |
7x5 =
35 u |
3x5 =
15 u |
70% =
70100 =
710The number of students who did not wear sweaters remains unchanged. LCM of 5 and 3 is 15.
Number of students who wore sweaters and left
= 35 u - 3 u
= 32 u
32 u = 96
1 u = 96 ÷ 32 = 3
Number of students who did not wear sweaters
= 15 u
= 15 x 3
= 45
Answer(s): 45
