238 people went to a park.
47 were children. Some adults left halfway and the ratio of the number of children to the number of adults became 8 : 3. How many adults left the park halfway?
| |
Children |
Adults |
Total |
| Before |
4x2 =
8 u |
3x2 =
6 u |
7x2 =
14 u |
| Change |
|
- ? |
|
| After |
8 u |
3 u |
|
Fraction of the people that were adults at first
= 1 -
47 =
37 Number of children remains unchanged. Make the number of children the same. LCM of 4 and 8 is 8.
Total number of people at first = 14 u
14 u = 238
1 u = 238 ÷ 14 = 17
Number of adults who left halfway
= 6 u - 3 u
= 3 u
= 3 x 17
= 51
Answer(s): 51
