Task: Question Answering
Input (English): Problem: if w / x = 2 / 3 and w / y = 6 / 15, then ( x + y ) / y =
Options: a. 4 / 5, b. 6 / 5, c. 7 / 5, d. 8 / 5, e. 9 / 5
Output (English): d