5/4x^2y + 3/5xy^2

2. Originally Posted by Panama
$5/4x^2y + 3/5xy^2$
$LCM=20x^2y^2$

$\frac {5}{4x^2y}+\frac{3}{5xy^2}$

$=\frac{25y+12x}{20x^2y^2}$

3. How did you get that final answer?

4. Originally Posted by Panama
How did you get that final answer?
divide the LCM by the denominator of the first fraction and multiply it with the numerator.. Same with second one and as it is a "+" sign in between add a + sign..

For example how will you do $\frac{1}{5}+\frac 1{6}$ ?