如何计算纯利润的百分比?

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select * from tbl_Articles WHERE ArticleID=408450 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=408450 LIMIT 0,1
select * from tbl_Articles_sphinx where id=408450 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(784666,657954,1421432,633090,877429,1160188,1116383,394308,478090,1176751,392257,641848,518238,1017516,1551383,465204,1541633,1118255,103270,868047,2353332,1065802,1125884,1187093,821017,385243,1861555,1563183,628925,2413942) ORDER BY field (ArticleID,784666,657954,1421432,633090,877429,1160188,1116383,394308,478090,1176751,392257,641848,518238,1017516,1551383,465204,1541633,1118255,103270,868047,2353332,1065802,1125884,1187093,821017,385243,1861555,1563183,628925,2413942)