解:8/3×2/4×7/5等于( 28/15 ) ∵已知需求出8/3×2/4×7/5等于多少 ∴8/3 × 2/4 × 7/5 = (4×2)/3 × 2/4 × 7/5 = 4/3 × 7/5 = (4×7)/(3×5) = 28/15 答:8/3×2/4×7/5等于28/15