The cost of a commodity this year has increased (1/20) compared to last year, but the original selling price is still maintained. Therefore, the profit per share has decreased (2/5). How much does the cost of this commodity account for in the selling price this year?
一种商品，今年的成本比去年增加了(1/20)，但仍保持原售价，因此，每份利润下降了(2/5)，则今年这种商品的成本占售价的多少．
<gadget id="calculator">14 / 15</gadget>
<output>14/15 = around 0.933333</output>

<result>14/15 = around 0.933333</result>