A water park had 9081 visitors in June. The ratio of adult to children was 4 : 5.
An adult ticket costs $10 and a child’s ticket costs $8.
In July the ticket prices increased to $15 for an adult and $11 for a child.
The number of visitors fell to 7000 in July, split in the ratio 2 : 5, adults to children.
The park manager thinks that sales had increased by more than 5%.
Is he correct? Give a reason for your answer.