40 kg of meat contains 6 kg of protein, what is the percentage of protein in the weight of the meat?
40千克肉中含6千克蛋白质，蛋白质占肉的重量的百分比是多少？
<gadget id="calculator">6 / 40</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>