A garment factory used to cost 160 yuan to produce a set of clothes. Due to the expansion of production scale, the cost of each set of clothes is now 128 yuan. Now the cost of each set of clothes has been reduced by how much?
一个服装厂原来生产一套服装的成本是160元，由于扩大生产规模，现在每套服装的成本是128元，现在每套服装的成本降低了百分之几？
<gadget id="calculator">160 - 128</gadget>
<output>32</output>

<gadget id="calculator">32 / 160</gadget>
<output>1/5 = around 0.2</output>

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