You are given a math word problem and you are supposed to apply multiplication or division mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Example Input: In one year , for the election for president there were 76.7 million voters , whereas in the next year there were 129.9 million voters . Find the percentage change in the number of voters ?
Example Output: 69.4

Example Input: Mark 's father gave him $ 85 . Mark bought 10 books , each of which cost $ 5 . How much money does Mark have left ?
Example Output: 35

Example Input: Bonnie has 10 tickets . If she shares them among 2 friends , how many tickets does each friend get ?
Example Output:
5