There are some students in the stadium.
14 of them are boys, of whom 20% of them do not wear scarves.
13 of the girls do not wear scarves. What is the percentage of the students in the stadium who wear scarves?
Boys |
Girls |
Total |
1x5 = 5 u |
3x5 = 15 u |
4x5 = 20 u |
No scarves |
Scarves |
No scarves |
Scarves |
|
1x1 |
4x1 |
1x5 |
2x5 |
|
1 u |
4 u |
5 u |
10 u |
20 u |
20% =
20100=
15 The number of boys is the repeated identity. Make the number of boys the same. LCM of 1 and 5 is 5.
Number of students who wear scarves
= 4 u + 10 u
= 14 u
Total number of students
= 1 u + 4 u + 5 u + 10 u
= 20 u
Percentage of the students in the stadium who wear scarves
=
1420 x 100%
= 70%
Answer(s): 70%