20千克比16千克多几分之几,16千克比20千克少几分之几?

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20千克比16千克多几分之几,16千克比20千克少几分之几?
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20千克比16千克多几分之几,16千克比20千克少几分之几?
20千克比16千克多几分之几,16千克比20千克少几分之几?

20千克比16千克多几分之几,16千克比20千克少几分之几?
(20-16)/16=1/4
(20-16)/20=1/5