Question 196256
sol:
12/(m+6)
--------
9m/(2m+12)
12              (2m+12)
----      *    ---------
(m+6)             9m
12             2(m+6)
---        *  --------- 
(m+6)           9m
here the canciling terms are m+6
12*2
-----
9m
canciling by 3 both numarator and denominator
4*2
----
3m
=8/3m