The fraction 15/8 is somewhat special because the numerator is large than the denominator. This special type of fraction prompts us to first ask the question: "How many times can we subtract 8 from 15?", or "How many times does 8 fit into 15?" The answer will be some whole number with, perhaps, a fractional remainder.

If we subtract 8 from 15 once, we get 7, which is too small to subtract 8 again. So, the number of times we can subtract 8 from 15 is only 1, and the remainder is 7/8.

So, the correct answer is 1+7/8