There are some students in the theme park.
310 of them are girls, of whom 30% of them do not wear watches.
57 of the boys do not wear watches. What is the percentage of the students in the theme park who do not wear watches?
Girls |
Boys |
Total |
3x10 = 30 u |
7x10 = 70 u |
10x10 = 100 u |
No watches |
Watches |
No watches |
Watches |
|
3x3 |
7x3 |
5x10 |
2x10 |
|
9 u |
21 u |
50 u |
20 u |
100 u |
30% =
30100=
310 The number of girls is the repeated identity. Make the number of girls the same. LCM of 3 and 10 is 30.
Number of students who do not wear watches
= 9 u + 50 u
= 59 u
Total number of students
= 9 u + 21 u + 50 u + 20 u
= 100 u
Percentage of the students in the theme park who do not wear watches
=
59100 x 100%
= 59%
Answer(s): 59%