5% off the price of a product, what is the current price of the original price
一种商品降价5%，现价是原价的多少
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<result>19/20 = around 0.95</result>