1:125/15=1乘15/125=15/125=3/252:3/7:4/9=2乘7/3乘9/4=21/23:0.125:5=3乘8乘1/5=24/51:7:2/3:3/2:6/7=1/7乘3/2乘2/3乘7/6=1/63:6/7:0.7=3乘7/6乘10/7=5
