There are some students in the school hall.
25 of them are boys, of whom 30% of them do not wear hats.
13 of the girls do not wear hats. What is the percentage of the students in the school hall who wear hats?
Boys |
Girls |
Total |
2x5 = 10 u |
3x5 = 15 u |
5x5 = 25 u |
No hats |
Hats |
No hats |
Hats |
|
3x1 |
7x1 |
1x5 |
2x5 |
|
3 u |
7 u |
5 u |
10 u |
25 u |
30% =
30100=
310 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 hats
= 7 u + 10 u
= 17 u
Total number of students
= 3 u + 7 u + 5 u + 10 u
= 25 u
Percentage of the students in the school hall who wear hats
=
1725 x 100%
= 68%
Answer(s): 68%