By adding similar fractions...Just simply add the corresponding numerator to the other numerator.
[tex]For\ example; \\ \frac{1}{10}+\frac{2}{10}+\frac{3}{10}= \frac{6}{10}\ or\ \frac{3}{5} \\ \\ \frac{5}{20} +\frac{7}{20}+\frac{7}{20}= \frac{19}{20} \\ \\ \frac{4}{15}+\frac{4}{15}+\frac{5}{15}= \frac{13}{15} [/tex]
As,simple as that...
Hope it Helps:)
------Domini------
