Question 208049
{{{2x/5y -3x/4y }}}


Least Common Denominator = 20y.


{{{(2x/5y)*(4/4) -(3x/4y)*(5/5)}}}
{{{(8x)/(20y) -(15x)/(20y) }}}
{{{(-7x)/(20y)}}}


R^2