There are some students in the zoo.
15 of them are girls, of whom 70% of them do not wear glasses.
14 of the boys do not wear glasses. What is the percentage of the students in the zoo who wear glasses?
| Girls |
Boys |
Total |
1x10 =
10 u |
4x10 =
40 u |
5x10 =
50 u |
| No glasses |
Glasses |
No glasses |
Glasses |
|
| 7x1 |
3x1 |
1x10 |
3x10 |
|
| 7 u |
3 u |
10 u |
30 u |
50 u |
70% =
70100=
710 The number of girls is the repeated identity. Make the number of girls the same. LCM of 1 and 10 is 10.
Number of students who wear glasses
= 3 u + 30 u
= 33 u
Total number of students
= 7 u + 3 u + 10 u + 30 u
= 50 u
Percentage of the students in the zoo who wear glasses
=
3350 x 100%
= 66%
Answer(s): 66%
