If 10 grams of salt is put into 100 water, the weight of the salt water will be only 100 grams after heating. At this time, the concentration of the salt water will increase by a few percent.
10克盐放入100水中，加热后盐水重量只剩100克，这时盐水浓度比原来提高百分之几．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">10 + 100</gadget>
<output>110</output>

<gadget id="calculator">10 / 110</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">(1/10) - (1/11)</gadget>
<output>1/110 = around 0.009091</output>

<gadget id="calculator">(1/110) / (1/11)</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>