4/7除以4/3
=4/7×3/4
=3/7
7/12除以14/15
=7/12×15/14
=1/12×15/2
=5/8
13/8除以26/5
=13/8×5/26
=5/16
9/10除以3/5
=9/10×5/3
=3/2