<PRE><B>Question 1062535</B>
5 by 36
The rational number {{{5/36}}}


-7 by 12
The rational number {{{-7/12}}}


Add the two rational numbers:
{{{5/36+(-7/12)}}}

{{{5/36-7/12}}}

Common denominator is 36.


{{{5/36-(7/12)(3/3)}}}


{{{5/36-21/36}}}


{{{-16/36}}}


Reduces to  {{{highlight(-4/9)}}}


</PRE>