The price of a certain brand of jeans is reduced by 15%, which means the original price
某品牌牛仔裤降价15%，表示的意义是是原价的多少
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<result>17/20 = around 0.85</result>