A piece of clothing worth 150 yuan is sold at a 15% discount. How much is the current price cheaper than the original price?
一件150元衣服打八五折销售，现价比原价便宜多少元．
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">150 * (3/20)</gadget>
<output>45/2 = around 22.5</output>

<result>45/2 = around 22.5</result>