Task: Question Answering
Input (English): Problem: subtract. simplify your answer and write it as a proper fraction or as a whole or mixed number. 4 / 5 - 1 / 5 =
Options: a. 1 / 5, b. 2 / 5, c. 3 / 5, d. 4 / 5, e. 5 / 5
Output (English): c