There are some students in the theme park.
110 of them are boys, of whom 10% of them do not wear hats.
29 of the girls do not wear hats. What is the percentage of the students in the theme park who do not wear hats?
Boys |
Girls |
Total |
1x10 = 10 u |
9x10 = 90 u |
10x10 = 100 u |
No hats |
Hats |
No hats |
Hats |
|
1x1 |
9x1 |
2x10 |
7x10 |
|
1 u |
9 u |
20 u |
70 u |
100 u |
10% =
10100=
110 The number of boys is the repeated identity. Make the number of boys the same. LCM of 1 and 10 is 10.
Number of students who do not wear hats
= 1 u + 20 u
= 21 u
Total number of students
= 1 u + 9 u + 20 u + 70 u
= 100 u
Percentage of the students in the theme park who do not wear hats
=
21100 x 100%
= 21%
Answer(s): 21%