A commodity, after the price is reduced by 8 yuan, the price is 72 yuan, how much is the price reduced
一种商品，降价8元后，价钱是72元，价格降低了多少
<gadget id="calculator">8 + 72</gadget>
<output>80</output>

<gadget id="calculator">8 / 80</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>