There are some students in the zoo.
15 of them are boys, of whom 75% of them do not wear scarves.
34 of the girls do not wear scarves. What is the percentage of the students in the zoo who wear scarves?
Boys |
Girls |
Total |
1x4 = 4 u |
4x4 = 16 u |
5x4 = 20 u |
No scarves |
Scarves |
No scarves |
Scarves |
|
3x1 |
1x1 |
3x4 |
1x4 |
|
3 u |
1 u |
12 u |
4 u |
20 u |
75% =
75100=
34 The number of boys is the repeated identity. Make the number of boys the same. LCM of 1 and 4 is 4.
Number of students who wear scarves
= 1 u + 4 u
= 5 u
Total number of students
= 3 u + 1 u + 12 u + 4 u
= 20 u
Percentage of the students in the zoo who wear scarves
=
520 x 100%
= 25%
Answer(s): 25%