A TV set is priced at 4590 yuan after a price reduction of 810 yuan. How many percent has the price of this TV been reduced?
一台电视机降价810元后售价4590元．这台电视机降价了百分之几？
<gadget id="calculator">810 + 4_590</gadget>
<output>5_400</output>

<gadget id="calculator">810 / 5_400</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>