first you make it an improper fraction: 8 5/6 = 53/6 4 9/10= 49/10 then you find a common denominator- 30 so then 53/6 would mulitply by 5= 265/30 49/10 multiplies by 3- 147/30 do calculation: 265-147= 118 118/30 and you can make it a mixed number and reduce to: 3 14/15
