A certain electronic product was sold at 80% of the price last year, and it could make a profit of 20%. Since the purchase price was lower this year, it was sold at 75% of the same price, but it could make a profit of 25%. What percentage of the price? (Profit Percentage=((Bid Price-Bid Price)/(Bid Price))*100%)
某电子产品去年按定价的80%出售，能获得20%的盈利，由于今年买入价降低，按同样定价的75%出售，却能获得25%的盈利，那么今年买入价是去年买入价的百分之几？(盈利百分数=((买出价-买入价)/(买入价))*100%)
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<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">(3/4) / (5/4)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(4/5) / (6/5)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(3/5) / (2/3)</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>