There are some students in the bird park.
310 of them are girls, of whom 70% of them do not wear scarves.
27 of the boys do not wear scarves. What is the percentage of the students in the bird park who wear scarves?
Girls |
Boys |
Total |
3x10 = 30 u |
7x10 = 70 u |
10x10 = 100 u |
No scarves |
Scarves |
No scarves |
Scarves |
|
7x3 |
3x3 |
2x10 |
5x10 |
|
21 u |
9 u |
20 u |
50 u |
100 u |
70% =
70100=
710 The number of girls is the repeated identity. Make the number of girls the same. LCM of 3 and 10 is 30.
Number of students who wear scarves
= 9 u + 50 u
= 59 u
Total number of students
= 21 u + 9 u + 20 u + 50 u
= 100 u
Percentage of the students in the bird park who wear scarves
=
59100 x 100%
= 59%
Answer(s): 59%