In salt water with a salt content of 20%, add 20 grams of salt and 20 grams of water, what is the salt content of the salt water?
在含盐率是20%的盐水中，加入盐和水各20克，这时盐水的含盐率高于多少
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

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