99,466,600
Explanations:The approximate number of people that took a vacation to the state park 15 years ago = 33,400
The number of people that vacationed to the state park last year = 99,500,000
The approximate difference between the number of people that visited the state 15 years ago and last year = 99,500,000 - 33,400
The approximate difference between the number of people that visited the state 15 years ago and last year = 99,466,600
Approximately, 99,466,600 more people visited the park last year than 15 years ago
