322 people went to a stadium.
37 were adults. Some children joined halfway and the ratio of the number of adults to the number of children became 6 : 11. How many children joined the stadium halfway?
| |
Adults |
Children |
Total |
| Before |
3x2 =
6 u |
4x2 =
8 u |
7x2 =
14 u |
| Change |
|
+ ? |
|
| After |
6 u |
11 u |
|
Fraction of the people that were children at first
= 1 -
37 =
47 Number of adults remains unchanged. Make the number of adults the same. LCM of 3 and 6 is 6.
Total number of people at first = 14 u
14 u = 322
1 u = 322 ÷ 14 = 23
Number of children who joined halfway
= 11 u - 8 u
= 3 u
= 3 x 23
= 69
Answer(s): 69
