If a commodity is sold at the original price, the profit per piece is 25% of the cost, and later it is sold at 90% of the original price, and the total profit obtained is 25% higher than the original price. What is the reduced sales volume compared to the original sales volume? Times.
某种商品按原定价出售，每件的利润为成本的25%，后来按原定价的90%出售，获得的总利润比原来增加了25%，那么降低后的销售量是原销售量的多少倍．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">100 * (5/4)</gadget>
<output>125</output>

<gadget id="calculator">125 - 100</gadget>
<output>25</output>

<gadget id="calculator">25 * 10</gadget>
<output>250</output>

<gadget id="calculator">250 * (5/4)</gadget>
<output>625/2 = around 312.5</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">125 * (9/10)</gadget>
<output>225/2 = around 112.5</output>

<gadget id="calculator">(225/2) - 100</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">(625/2) / (25/2)</gadget>
<output>25</output>

<gadget id="calculator">25 / 10</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>