There are some students in the school hall.
310 of them are girls, of whom 40% of them do not wear scarves.
47 of the boys do not wear scarves. What is the percentage of the students in the school hall who do not wear scarves?
Girls |
Boys |
Total |
3x5 = 15 u |
7x5 = 35 u |
10x5 = 50 u |
No scarves |
Scarves |
No scarves |
Scarves |
|
2x3 |
3x3 |
4x5 |
3x5 |
|
6 u |
9 u |
20 u |
15 u |
50 u |
40% =
40100=
25 The number of girls is the repeated identity. Make the number of girls the same. LCM of 3 and 5 is 15.
Number of students who do not wear scarves
= 6 u + 20 u
= 26 u
Total number of students
= 6 u + 9 u + 20 u + 15 u
= 50 u
Percentage of the students in the school hall who do not wear scarves
=
2650 x 100%
= 52%
Answer(s): 52%