25/18除以10/9
=25/18*9/10
=5/2*1/2
=5/4
=1又1/4
2又3/4除以3/4
=11/4*4/3
=11/3
=3又2/3
5又6/7除以3又1/14
=41/7除以43/14
=41/7*14/43
=82/43
=1又39/43
10 又5/9除以3又5分之4
=95/9除以19/5
=95/9*5/19
=475/171
=2又133/171
4/5*15/16除以5/6
=4/5*15/16*6/5
=1*3/4*6/5
=3/2*3/5
=9/10
4/5除以15/16*5/6
=4/5*16/15*5/6
=2*16/15*1/3
=32/45