(0)400÷500=a0%; 答:甲数是乙数的a0%. (2)500÷400=025% 答:乙数是甲数的025%. (x)(500-400)÷500 =000÷500 =20%; 答:甲数比乙数少20%. (4)(500-400)÷400 =000÷400 =25%; 答:乙数比甲数多25%. (5)400÷(400+500) =400÷900 ≈44.4% 答:甲数占甲、乙两数和的44.4%. (l)500÷(500-400) =500÷000 =500% 答:乙数相当于甲、乙两数差的500%. |