DR.PHD: Evaluate 0.38-0.25 by converting each decimal to a fraction
0.38 = 38/100
0.25 = 1/4
0.38-0.25 = 38/100 - 25/100 = 13/100
I don't think I can give more explanation to this other than this website.
http://www.mathsisfun.com/fractions_addition.html
