The price of an imported chip dropped by 15% last year compared to the previous year, and this year it dropped by 5% compared to last year. How much is the price of this chip dropped this year compared to the previous year?
一种进口芯片去年比前年降价15%，今年又比去年降价5%，这种芯片今年的价格比前年下降了百分之几？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

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

<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>

<gadget id="calculator">(17/20) * (19/20)</gadget>
<output>323/400 = around 0.8075</output>

<gadget id="calculator">1 - (323/400)</gadget>
<output>77/400 = around 0.1925</output>

<result>77/400 = around 0.1925</result>