The shopping mall engages in promotional activities, and the price of a set of clothing is reduced by 10%. On this basis, the shopping mall returns 5% of the selling price to the customer in cash. What percent is the actual price reduction for this outfit?
商场搞促销活动，一套服装先降价10%，在此基础上，商场又返还售价5%的现金给顾客．这套服装实际降价百分之几？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">(9/10) * (19/20)</gadget>
<output>171/200 = around 0.855</output>

<gadget id="calculator">1 - (171/200)</gadget>
<output>29/200 = around 0.145</output>

<result>29/200 = around 0.145</result>