0.75 : x = 1.25 :20.75 * 2 = 1.25x1.25x=1.5x=1.5/1.25x=1.2
0.75和X的比等于1.25和2比0.75×2=1.25x1.25x=1.5x=1.2
0.75/x=1.25/2x=2*0.75/1.25=1.2