化简下面各比,并求出比值。 20:8 : 25%:0.75
73.8×16-73.8×6 (0.125×8-0.5)÷0.25
3.5×(20.6-16.8÷4.8) 16.2÷(3.2×0.25+4.6)
2.5÷[(17.2-4.5×3.6)÷0.04] 4.5÷0.25-0.75×1.2
(66-32×1.2)÷0.25 12.5×(1618-8.4÷0.12)
(7.2-3.15)÷0.6×1.396.5×43.5+43.5×28.5-25×43.5