The salt content (1/11) of 55 kg of brine is measured. Now add water to the brine to make the salt content of the brine reach 5%, how many kilograms of water should be added.
测得55千克的盐水含盐量(1/11)，现在盐水中加水，使盐水含盐量达到5%，就加水多少千克．
<gadget id="calculator">1 / 11</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/11) / (1/20)</gadget>
<output>20/11 = around 1.818182</output>

<gadget id="calculator">55 * (20/11)</gadget>
<output>100</output>

<gadget id="calculator">100 - 55</gadget>
<output>45</output>

<result>45</result>