You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.

Input: Consider Input: Question: The original price of a shirt was $20. It was decreased to $15 . What is the percent decrease of the price of this shirt.

Option A: 25%

Option B: 35%

Option C: 45%

Option D: 55%

Option E: 65%

Output: Option A

Input: Consider Input: Question: Three candidates contested in an election and received 6136, 7636, 11628 votes respectively. What is the percentage of the total votes did the winning candidate get?

Option A: 46%

Option B: 49%

Option C: 57%

Option D: 51%

Option E: 62%

Output: Option A

Input: Consider Input: Question: If w/x = 5/7 and w/y = 4/7, then (x + y)/y =

Option A: 1/2

Option B: 7/3

Option C: 6/7

Option D: 1/5

Option E: 11/13
Output: Option B