Spotlight Computes Modulus of Negative Numbers Incorrectly

I'm an undergraduate math major. Occasionally I use spotlight to check my calculations. However, when computing the modulus (%) of negative numbers using spotlight, the calculator returns incorrect answers. I'm wondering if anyone else has noticed this, or why this might be (aside from bad coding)? For instance it returns,

-2%3 = -2, and -1%3 = -1.

However, if you were to Google "-2%3", or compute this in Wolfram Alpha, Python, R, C, etc you see:

-2%3 = 1, and -1%3=2.

These are indeed the correct answers as:

-2 = 3*(-1) + 1, and -1 = 3*(-1) + 2

I have submitted feedback through the official channel about this, but figured I would post here to bring attention to the problem. I hope Apple fixes this so the large number of students who use their products are not misled.

2011 Macbook Pro 13", OSX 10.11.3