7/16:21/32=7/16*32/21=(1*2)/(1*3)=2/3
2,7:9/14=227/10*14/9=(3*7)/(5*1)=21/5=4 1/5
2 3/7:51=17/7*1/51=(1*1)/(7*3)=1/21
36*1/30:2,4=36/1*31/30*10/24=(3*31*1)/(1*3*2)=(1*31*1)/(1*1*2)=
=31/2=15 1/2
3/11*3 2/3:4 1/2=3/11*11/3*2/9=1*2/9=2/9
(7/18+0,3):(3-14/15)=(7/18+3/10):2 1/15=(35/90+27/90):2 1/15=
=62/90*15/31=(2*1)/(6*1)=1/3