with fractions being divided by fractions, you have to multiply by the recpricel or copy dot flip. so 5/6 / 7/10 would be 5/6 X10/7. 10x5=50 and 7x6=42. it would be 50/42 which if you simplify it would be 1/8/42 which is also 1/4/21 which is the simplified answer there is