456 people went to a tourist attraction.
38 were adults. Some children joined halfway and the ratio of the number of adults to the number of children became 9 : 19. How many children joined the tourist attraction halfway?
| |
Adults |
Children |
Total |
| Before |
3x3 =
9 u |
5x3 =
15 u |
8x3 =
24 u |
| Change |
|
+ ? |
|
| After |
9 u |
19 u |
|
Fraction of the people that were children at first
= 1 -
38 =
58 Number of adults remains unchanged. Make the number of adults the same. LCM of 3 and 9 is 9.
Total number of people at first = 24 u
24 u = 456
1 u = 456 ÷ 24 = 19
Number of children who joined halfway
= 19 u - 15 u
= 4 u
= 4 x 19
= 76
Answer(s): 76
