A supermarket bought a batch of rice cookers with a unit price of 200 yuan, and sold 6 rice cookers at a profit of 20 yuan each, 3 rice cookers at a profit of 15 yuan each, and the remaining 1 rice cooker at the purchase price. What is the profit margin of the supermarket operating these rice cookers? (Hint: profit margin = ((profit)/(cost (purchase price)))*100%)
某超市进了一批单价为200元的电饭锅，按每个20元的利润卖了6个，按每个15元的利润卖了3个，剩下的1个按进价出售，该超市经营这批电饭锅的利润率是多少？(提示：利润率=((利润)/(成本(进价)))*100%)
<gadget id="calculator">245 / 2_000</gadget>
<output>49/400 = around 0.1225</output>

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

<gadget id="calculator">(49/400) * 1</gadget>
<output>49/400 = around 0.1225</output>

<result>49/400 = around 0.1225</result>