20 grams of salt is dissolved in 1000 grams of water, and the salt accounts for ((())/(())) of the brine.
20克盐溶解在1000克水中，盐占盐水的((())/(()))．
<gadget id="calculator">20 + 1_000</gadget>
<output>1_020</output>

<gadget id="calculator">20 / 1_020</gadget>
<output>1/51 = around 0.019608</output>

<result>1/51 = around 0.019608</result>