20 grams of salt is dissolved in 100 grams of water, what is the percentage of salt in the salt water
20克盐溶解在100克水中，盐占盐水的多少
<gadget id="calculator">100 + 20</gadget>
<output>120</output>

<gadget id="calculator">20 / 120</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>