Dissolve 8 grams of salt in 12 grams of water, what is the percentage of salt in the salt water?
把8克盐溶解在12克水中，盐占盐水的多少．
<gadget id="calculator">8 + 12</gadget>
<output>20</output>

<gadget id="calculator">8 / 20</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>