Since the purchase price of a store has dropped by 8%, while the selling price remains unchanged, its interest rate (according to the purchase price) has increased from the current x% to (x+10)%, then x=how much.
某商店由于进货价下降8%，而售价不变，使得它的利率(按进货价而定)由目前的x%增加到(x+10)%，则x=多少．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">8 / 100</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">(1/10) * (2/25)</gadget>
<output>1/125 = around 0.008</output>

<gadget id="calculator">(1/10) - (2/25) - (1/125)</gadget>
<output>3/250 = around 0.012</output>

<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">(1/100) * (2/25)</gadget>
<output>1/1_250 = around 0.0008</output>

<gadget id="calculator">(1/1_250) - (1/100)</gadget>
<output>-23/2_500 = around -0.0092</output>

<gadget id="calculator">(1/100) + (-23/2_500)</gadget>
<output>1/1_250 = around 0.0008</output>

<gadget id="calculator">(3/250) / (1/1_250)</gadget>
<output>15</output>

<result>15</result>