甲数比乙数多5分之1,乙数比甲数少()
\u7532\u6570\u6bd4\u4e59\u6570\u591a5\u5206\u4e4b1\uff0c\u6240\u4ee5\u4e59\u6570\u6bd4\u7532\u6570\u5c11\uff08 \uff09\u3002\u7532\u6570\u6bd4\u4e59\u6570\u591a5\u5206\u4e4b1\uff0c\u6709\u4e24\u79cd\u89e3\u91ca\uff1a
\u4e00\u3001\u5982\u679c\u662f\u7532\u6570-\u4e59\u6570=5\u5206\u4e4b1\uff0c\u5219\u4e59\u6570\u6bd4\u7532\u6570\u5c11\uff085\u5206\u4e4b1 \uff09\u3002
\u4e8c\u3001(\u7532\u6570-\u4e59\u6570)\u9664\u4ee5\u4e59\u6570=5\u5206\u4e4b1\uff0c\u5219\u4e59\u6570\u6bd4\u7532\u6570\u5c11\uff086\u5206\u4e4b1 \uff09\uff0c
\u3010\u56e0\u4e3a\u7532\u6570\u662f\u4e59\u6570\u76845\u5206\u4e4b6\u500d\uff0c\u6240\u4ee5\u4e59\u6570\u662f\u7532\u6570\u76846\u5206\u4e4b5\u500d\u554a\u3011
\u7532\u6570\u6bd4\u4e59\u6570\u5c115\u5206\u4e4b1\uff0c\u5219\u4e59\u6570\u6bd4\u7532\u6570\u591a5\u5206\u4e4b1
\u3010\u8bf4\u6cd5\u9519\u8bef\u3011
\u7532\u6570\u6bd4\u4e59\u6570\u5c115\u5206\u4e4b1\uff0c\u5219\u7532\u6570=\u4e59\u6570\u00d7(1-1/5)=\u4e59\u6570\u00d7(4/5)\uff0c
\u5219\u4e59\u6570\u6bd4\u7532\u6570\u591a\uff1a(\u4e59\u6570-\u7532\u6570)/\u7532\u6570=[\u4e59\u6570-\u4e59\u6570\u00d7(4/5)]/[\u4e59\u6570\u00d7(4/5)]=(1/5)]/(4/5)=1/4
所以乙数比甲数少：1/5÷ 6/5=1/6
设乙为x
则甲为（1+1/5）*x=6/5*x
所以乙数比甲数少： (6/5*x-x) / (6/5*x)=1/6
1/6
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