There are some students in the zoo.
710 of them are girls, of whom 10% of them do not wear hats.
13 of the boys do not wear hats. What is the percentage of the students in the zoo who do not wear hats?
| Girls |
Boys |
Total |
7x10 =
70 u |
3x10 =
30 u |
10x10 =
100 u |
| No hats |
Hats |
No hats |
Hats |
|
| 1x7 |
9x7 |
1x10 |
2x10 |
|
| 7 u |
63 u |
10 u |
20 u |
100 u |
10% =
10100=
110 The number of girls is the repeated identity. Make the number of girls the same. LCM of 7 and 10 is 70.
Number of students who do not wear hats
= 7 u + 10 u
= 17 u
Total number of students
= 7 u + 63 u + 10 u + 20 u
= 100 u
Percentage of the students in the zoo who do not wear hats
=
17100 x 100%
= 17%
Answer(s): 17%
