$\displaystyle \lim_{x \to 1^{+} } \frac{-x}{x - 2}$

I only know how to do this by direct substitution, but I'm not sure how to do it from one side. In the calculator, I tried putting in:

-1.000001 / (1.000001 - 2) and it gives me a positive value of a little greater than 1, but I don't know how to algebraically show this step since saying "I put a value close to 1 a little greater than 1 into the calculator" isn't a valid response, I think.