There are some students in the bird park.
310 of them are girls, of whom 80% of them do not wear scarves.
67 of the boys do not wear scarves. What is the percentage of the students in the bird park who do not wear scarves?
| Girls |
Boys |
Total |
3x5 =
15 u |
7x5 =
35 u |
10x5 =
50 u |
| No scarves |
Scarves |
No scarves |
Scarves |
|
| 4x3 |
1x3 |
6x5 |
1x5 |
|
| 12 u |
3 u |
30 u |
5 u |
50 u |
80% =
80100=
45 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
= 12 u + 30 u
= 42 u
Total number of students
= 12 u + 3 u + 30 u + 5 u
= 50 u
Percentage of the students in the bird park who do not wear scarves
=
4250 x 100%
= 84%
Answer(s): 84%
