A pharmacy sells "Changmaotong" with a price increase of 50% when the market is in short supply. After investigation by the price department, the price increase is limited to 20% of the original price. How much should the price of the drug be reduced now?
某药店经销的"感冒通"，在市场紧缺的情况下提价50%，物价部门查处后，限定其提价幅度只能是原价的20%，则该药品现在需降价百分之几？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">1 * (3/2)</gadget>
<output>3/2 = around 1.5</output>

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

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1 * (6/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(3/2) - (6/5)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(3/10) / (3/2)</gadget>
<output>1/5 = around 0.2</output>

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