240 people went to a tourist attraction.
45 were adults. Some children left halfway and the ratio of the number of adults to the number of children became 16 : 1. How many children left the tourist attraction halfway?
| |
Adults |
Children |
Total |
| Before |
4x4 =
16 u |
1x4 =
4 u |
5x4 =
20 u |
| Change |
|
- ? |
|
| After |
16 u |
1 u |
|
Fraction of the people that were children at first
= 1 -
45 =
15 Number of adults remains unchanged. Make the number of adults the same. LCM of 4 and 16 is 16.
Total number of people at first = 20 u
20 u = 240
1 u = 240 ÷ 20 = 12
Number of children who left halfway
= 4 u - 1 u
= 3 u
= 3 x 12
= 36
Answer(s): 36
