252 people went to a museum.
27 were adults. Some children left halfway and the ratio of the number of adults to the number of children became 6 : 13. How many children left the museum halfway?
| |
Adults |
Children |
Total |
| Before |
2x3 =
6 u |
5x3 =
15 u |
7x3 =
21 u |
| Change |
|
- ? |
|
| After |
6 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 6 is 6.
Total number of people at first = 21 u
21 u = 252
1 u = 252 ÷ 21 = 12
Number of children who left halfway
= 15 u - 13 u
= 2 u
= 2 x 12
= 24
Answer(s): 24
