Usually selling a Konka color TV with a price of 1840 yuan, the merchant can earn 15%. It is now sold at a reduced price of 1680 yuan, is the merchant earning or accompanying? Earn (or lose) what percentage?
平时卖一台售价1840元的康佳彩电，商家可赚15%．现以1680元降价卖出，商家是赚还是陪？赚(或赔)百分之几？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">1_840 / (23/20)</gadget>
<output>1_600</output>

<gadget id="calculator">1_680 - 1_600</gadget>
<output>80</output>

<gadget id="calculator">80 / 1_600</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>