In brine with a salt content of 20%, add 4 grams of salt and 12 grams of water, what is the salt content at this time
在含盐率20%的盐水中，加入4克盐和12克水，这时的含盐率大于多少
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>