解比例0.25:x=2/31/4:x=2/3x=1/4*3/2x=3/8
0.25：x=2:32X=0.25X32x=0.75x=0.375(用分数表示为八分之三）望采纳
2x=0.25乘32x=0.75x=0.375
2x＝0.25×32x＝0.752x÷2＝0.75÷2x＝0.275
