Chuck Klosterman said, and I agree, that the phrase, comparing apples to oranges is used incorrectly. Are you trying to say that prostitution and robbery are not all that different? Cause look at apples and oranges, they have a lot in common. Both fruits, edible, roundish in shape, weigh about the same, about the same size. If you're trying to say two things are totally different then you should say something along the lines of, it's like comparing apples to baby wolverines or something like that.
She's talking about the 99.9% number you used.