448 people went to a stadium.
38 were children. Some adults left halfway and the ratio of the number of children to the number of adults became 6 : 7. How many adults left the stadium halfway?
| |
Children |
Adults |
Total |
| Before |
3x2 =
6 u |
5x2 =
10 u |
8x2 =
16 u |
| Change |
|
- ? |
|
| After |
6 u |
7 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 = 448
1 u = 448 ÷ 16 = 28
Number of adults who left halfway
= 10 u - 7 u
= 3 u
= 3 x 28
= 84
Answer(s): 84
