Okay, this might be pretty basic, but I am in the process of approximating the percent error in computing the area of a square. One of the square's side is 19 cm and has a possible error of 0.05 cm.

I got to where dA = +- 1.9cm^{2}

Now, I got dA/A = 1.9/19 which equals, about .0052631579

With that being said, I have gone completely blank and have no idea on how to turn that decimal into a fraction of a percent. Thank you for your help!

If my math is too sloppy, please explain how to make it look better(actually showing numerator on top of denominator, etc)