5/8和3/4和11/20和7/6和2/3和4/5通分为:5/8=75/1203/4=90/12011/20=66/1207/6=140/1202/3=80/1204/5=96/120
5/8和3/4和11/20和7/6和2/3和4/575/120=5/890/120=3/466/120=11/20140/120=7/680/120=2/396/120=4/5