525 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 : 11. How many children left the museum halfway?
|
Adults |
Children |
Total |
Before |
2x3 = 6 u |
5x3 = 15 u |
7x3 = 21 u |
Change |
|
- ? |
|
After |
6 u |
11 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 = 525
1 u = 525 ÷ 21 = 25
Number of children who left halfway
= 15 u - 11 u
= 4 u
= 4 x 25
= 100
Answer(s): 100