208 people went to a park.
58 were adults. Some children left halfway and the ratio of the number of adults to the number of children became 10 : 3. How many children left the park halfway?
| |
Adults |
Children |
Total |
| Before |
5x2 =
10 u |
3x2 =
6 u |
8x2 =
16 u |
| Change |
|
- ? |
|
| After |
10 u |
3 u |
|
Fraction of the people that were children at first
= 1 -
58 =
38 Number of adults remains unchanged. Make the number of adults the same. LCM of 5 and 10 is 10.
Total number of people at first = 16 u
16 u = 208
1 u = 208 ÷ 16 = 13
Number of children who left halfway
= 6 u - 3 u
= 3 u
= 3 x 13
= 39
Answer(s): 39
