解:64除以85等于( 64/85 ),【即约等于0.75】 ∵已知需求出64除以85等于几 X ÷ Y = X / Y = Z ∴64除以85 = 64 ÷ 85 = 64 × 1/85 = 64/85 = 0.7529411765 ≈ 0.75 答:64除以85等于64/85,【即约等于0.75】