toy is sold at a reduced price on Children’s Day. After a reduction of 20 yuan, the current price is 80 yuan. What percentage is the price reduction?
一种玩具在六一儿童节降价出售，降了20元后，现在价格是80元，降价百分之几？
<gadget id="calculator">20 + 80</gadget>
<output>100</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>