In a tuckshop,
710 of the students wore scarves. After 8 students who wore scarves entered the tuckshop, the percentage of students who wore scarves increased to 75%. How many students in the tuckshop did not wear scarves?
| |
Wore scarves |
Did not wear scarves |
| Before |
7x1 =
7 u |
3x1 =
3 u |
| Change |
+ 8 |
|
| After |
3x3 =
9 u |
1x3 =
3 u |
75% =
75100 =
34The number of students who did not wear scarves remains unchanged. LCM of 3 and 1 is 3.
Number of students who wore scarves and left
= 9 u - 7 u
= 2 u
2 u = 8
1 u = 8 ÷ 2 = 4
Number of students who did not wear scarves
= 3 u
= 3 x 4
= 12
Answer(s): 12
