Task: Question Answering
Input (English): Problem: a certain pair of used shoes can be repaired for $ 10.50 and will last for 1 year . a pair of the same kind of shoes can be purchased new for $ 30.00 and will last for 2 years . the average cost per year of the new shoes is what percent greater than the cost of repairing the used shoes ? 
Options: a ) 42.85 , b ) 44 , c ) 48 , d ) 38 , e ) 40
Output (English): a