The original price of a piece of clothing is 160 yuan, but now the price is 120 yuan. How much is the price of this dress cheaper than the original? How much discount is it on sale?
一件衣服原价是160元，现在售价是120元．这件衣服的价格比原来便宜了百分之几？是打几折出售的？
<gadget id="calculator">120 / 160</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>