the given expression is,\
9/12 + 3/6 + 3/9
we have denominators 12 , 6 , 9
now we take the LCM to get common denominator
LCM of 12, 6 , 9 is
12 = 3 x 2 x 2
6 = 2 x 3
9 = 3 x 3
so the LCM is 3 x 3 x 2 x 2 = 36
[tex]\frac{9}{12}+\frac{3}{6}+\frac{3}{9}=\frac{9\times3+3\times6+3\times4}{36}[/tex][tex]\frac{27+18+12}{36}=\frac{57}{36}[/tex]so the answer is 57
