There are some students in the zoo.
25 of them are boys, of whom 10% of them do not wear watches.
23 of the girls do not wear watches. What is the percentage of the students in the zoo who wear watches?
Boys |
Girls |
Total |
2x5 = 10 u |
3x5 = 15 u |
5x5 = 25 u |
No watches |
Watches |
No watches |
Watches |
|
1x1 |
9x1 |
2x5 |
1x5 |
|
1 u |
9 u |
10 u |
5 u |
25 u |
10% =
10100=
110 The number of boys is the repeated identity. Make the number of boys the same. LCM of 2 and 10 is 10.
Number of students who wear watches
= 9 u + 5 u
= 14 u
Total number of students
= 1 u + 9 u + 10 u + 5 u
= 25 u
Percentage of the students in the zoo who wear watches
=
1425 x 100%
= 56%
Answer(s): 56%