Task: Question Answering
Input (English): Problem: after giving a discount of rs . 45 the shopkeeper gets a loss of 10 % , if the cost price is rs . 180 . find the markup % ? 
Options: a ) 0.21 , b ) 0.2 , c ) 0.17 , d ) 0.21 , e ) 0.15
Output (English): e