How many grams of water can be dissolved in 10 grams of salt to make the salt content of salt water 5%.
把10克盐溶解在多少克水中，才能使盐水的含盐率为5%．
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">10 / (1/20)</gadget>
<output>200</output>

<gadget id="calculator">200 - 10</gadget>
<output>190</output>

<result>190</result>