You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
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Question: Zoe had 6 songs on her mp3 player . If she deleted 3 old songs from it and then added 20 new songs , how many songs does she have on her mp3 player ?

Answer: 23


Question: For the school bake sale Wendy made pastries . She baked 41 cupcakes and 31 cookies . After the sale she had 32 to take back home . How many pastries did she sell ?

Answer: 40


Question: At a sale , the cost of a pair of shoes was reduced from 42 dollars to 33.6 dollars . What was the percent of discount ?

Answer:
20