There are some students in the stadium.
710 of them are boys, of whom 20% of them do not wear watches.
13 of the girls do not wear watches. What is the percentage of the students in the stadium who do not wear watches?
Boys |
Girls |
Total |
7x5 = 35 u |
3x5 = 15 u |
10x5 = 50 u |
No watches |
Watches |
No watches |
Watches |
|
1x7 |
4x7 |
1x5 |
2x5 |
|
7 u |
28 u |
5 u |
10 u |
50 u |
20% =
20100=
15 The number of boys is the repeated identity. Make the number of boys the same. LCM of 7 and 5 is 35.
Number of students who do not wear watches
= 7 u + 5 u
= 12 u
Total number of students
= 7 u + 28 u + 5 u + 10 u
= 50 u
Percentage of the students in the stadium who do not wear watches
=
1250 x 100%
= 24%
Answer(s): 24%