Question 446828
{{{ -5/9 + 1/13 }}}
The LCD is {{{ 9*13 }}}
Multiply the 1st term by {{{ 13/13 }}}
Multiply the 2nd term by {{{ 9/9 }}}
{{{ (-5/9)*(13/13)  + (1/13)*(9/9) }}}
{{{ -65/117 + 9/117 }}}
{{{ -56/117 }}}
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check with calculator:
{{{ -5/9 + 1/13 = -.5555 + .07692 }}}
{{{ -5/9 + 1/13 = -.4785 }}}
and
{{{ -56/117 = -.4786 }}}
close enough