How much is the price of each computer whose original price is a yuan after the price is reduced by 15%.
每台原价是a元的电脑降价15%后是多少元．
<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>