Step-by-step explanation: You can't continue on with the problem until the denominators are the same. So you need to find the LCD (Least Common Denominator). For example...
[tex]\frac{1}{2} +\frac{1}{3}[/tex] The LCD is six
[tex]\frac{1*3}{2*3}=\frac{3}{6} =\frac{1}{3}[/tex]
[tex]\frac{1}{2}+ \frac{1}{3}= \frac{3}{6} +\frac{2}{6}[/tex]
[tex]\frac{3+2}{6}= \frac{5}{6}[/tex]
Hope this helps, have a BLESSED and wonderful day! :-)
-Cutiepatutie <3