In a parade square,
59 of the students wore scarves. After 49 students who wore scarves entered the parade square, the percentage of students who wore scarves increased to 75%. How many students in the parade square did not wear scarves?
|
Wore scarves |
Did not wear scarves |
Before |
5x1 = 5 u |
4x1 = 4 u |
Change |
+ 49 |
|
After |
3x4 = 12 u |
1x4 = 4 u |
75% =
75100 =
34The number of students who did not wear scarves remains unchanged. LCM of 4 and 1 is 4.
Number of students who wore scarves and left
= 12 u - 5 u
= 7 u
7 u = 49
1 u = 49 ÷ 7 = 7
Number of students who did not wear scarves
= 4 u
= 4 x 7
= 28
Answer(s): 28