There are some students in the stadium.
710 of them are girls, of whom 80% of them do not wear watches.
23 of the boys do not wear watches. What is the percentage of the students in the stadium who do not wear watches?
Girls |
Boys |
Total |
7x5 = 35 u |
3x5 = 15 u |
10x5 = 50 u |
No watches |
Watches |
No watches |
Watches |
|
4x7 |
1x7 |
2x5 |
1x5 |
|
28 u |
7 u |
10 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 7 and 5 is 35.
Number of students who do not wear watches
= 28 u + 10 u
= 38 u
Total number of students
= 28 u + 7 u + 10 u + 5 u
= 50 u
Percentage of the students in the stadium who do not wear watches
=
3850 x 100%
= 76%
Answer(s): 76%