Question 645625
6 4/5=34/5
(34/5)/17=(34/5)*1/17=2/5 ans.

3 4/9=31/9
2 1/3=7/3
(31/9)/(7/3) invert & multiply
(31/9)/(3/7)=(31*3)/(9*7)=93/63 reduce by dividing by 21.
93/63=31/21 ans.