196 people went to a safari park.
27 were adults. Some children joined halfway and the ratio of the number of adults to the number of children became 4 : 13. How many children joined the safari park halfway?
| |
Adults |
Children |
Total |
| Before |
2x2 =
4 u |
5x2 =
10 u |
7x2 =
14 u |
| Change |
|
+ ? |
|
| After |
4 u |
13 u |
|
Fraction of the people that were children at first
= 1 -
27 =
57 Number of adults remains unchanged. Make the number of adults the same. LCM of 2 and 4 is 4.
Total number of people at first = 14 u
14 u = 196
1 u = 196 ÷ 14 = 14
Number of children who joined halfway
= 13 u - 10 u
= 3 u
= 3 x 14
= 42
Answer(s): 42
