At the theme park, there were 60% as many girls as boys and 30% more adults than girls. Given that there were 81 less girls than adults at the theme park, how many children were there altogether?
| Girls |
Boys |
Adults |
| 3x10 |
5x10 |
|
| 10x3 |
|
13x3 |
| 30 u |
50 u |
39 u |
60% =
60100 =
35Girls : Boys = 3 : 5
100% + 30% = 130%
130% =
130100 =
1310 Girls : Adults = 10 : 13
The number of girls is repeated. Make the number of girls the same. LCM of 3 and 10 is 30.
Number of less girls than adults
= 39 u - 30 u
= 9 u
9 u = 81
1 u = 81 ÷ 9 = 9
Number of children
= 30 u + 50 u
= 80 u
= 80 x 9
= 720
Answer(s): 720
