Add 15 grams of water and 5 grams of salt to the salt water with a salt content of 15%. What is the salt content of the salt water at this time?
在含盐率为15%的盐水中再加15克水和5克盐，这时盐水的含盐率是大于多少
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>