The task is to generate the correct answer for a given math problem.
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Question: Problem: bob wants to run a mile in the same time as his sister . if bob ’ s time for a mile is currently 11 minutes 20 seconds and his sister ’ s time is currently 9 minutes 36 seconds , by what percent does bob need to improve his time in order run a mile in the same time as his sister ?

Answer: 15 


Question: Problem: what is the probability of getting a queen or spade from a set of cards ?

Answer: 4 / 13


Question: Problem: bill made a profit of 10 % by selling a product . if he had purchased that product for 10 % less and sold it at a profit of 30 % , he would have received $ 63 more . what was his original selling price ?

Answer:
$ 990