330 people went to a tourist attraction.
25 were children. Some adults left halfway and the ratio of the number of children to the number of adults became 6 : 5. How many adults left the tourist attraction halfway?
|
Children |
Adults |
Total |
Before |
2x3 = 6 u |
3x3 = 9 u |
5x3 = 15 u |
Change |
|
- ? |
|
After |
6 u |
5 u |
|
Fraction of the people that were adults at first
= 1 -
25 =
35 Number of children remains unchanged. Make the number of children the same. LCM of 2 and 6 is 6.
Total number of people at first = 15 u
15 u = 330
1 u = 330 ÷ 15 = 22
Number of adults who left halfway
= 9 u - 5 u
= 4 u
= 4 x 22
= 88
Answer(s): 88