At the trampoline park, there were 75% as many boys as girls and 30% more adults than boys. Given that there were 45 more adults than boys at the trampoline park, how many children were there altogether?
Boys |
Girls |
Adults |
3x10 |
4x10 |
|
10x3 |
|
13x3 |
30 u |
40 u |
39 u |
75% =
75100 =
34Boys : Girls = 3 : 4
100% + 30% = 130%
130% =
130100 =
1310 Boys : Adults = 10 : 13
The number of boys is repeated. Make the number of boys the same. LCM of 3 and 10 is 30.
Number of more adults than boys
= 39 u - 30 u
= 9 u
9 u = 45
1 u = 45 ÷ 9 = 5
Number of children
= 30 u + 40 u
= 70 u
= 70 x 5
= 350
Answer(s): 350