608 people went to a safari park.
38 were adults. Some children left halfway and the ratio of the number of adults to the number of children became 12 : 17. How many children left the safari park halfway?
|
Adults |
Children |
Total |
Before |
3x4 = 12 u |
5x4 = 20 u |
8x4 = 32 u |
Change |
|
- ? |
|
After |
12 u |
17 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 12 is 12.
Total number of people at first = 32 u
32 u = 608
1 u = 608 ÷ 32 = 19
Number of children who left halfway
= 20 u - 17 u
= 3 u
= 3 x 19
= 57
Answer(s): 57