208 people went to a theme park.
38 were children. Some adults joined halfway and the ratio of the number of children to the number of adults became 6 : 13. How many adults joined the theme park halfway?
| |
Children |
Adults |
Total |
| Before |
3x2 =
6 u |
5x2 =
10 u |
8x2 =
16 u |
| Change |
|
+ ? |
|
| After |
6 u |
13 u |
|
Fraction of the people that were adults at first
= 1 -
38 =
58 Number of children remains unchanged. Make the number of children the same. LCM of 3 and 6 is 6.
Total number of people at first = 16 u
16 u = 208
1 u = 208 ÷ 16 = 13
Number of adults who joined halfway
= 13 u - 10 u
= 3 u
= 3 x 13
= 39
Answer(s): 39
