200 kg of seawater contains 5 kg of salt, how much water accounts for in seawater
200千克海水含盐5千克，水占海水的多少
<gadget id="calculator">200 - 5</gadget>
<output>195</output>

<gadget id="calculator">195 / 200</gadget>
<output>39/40 = around 0.975</output>

<result>39/40 = around 0.975</result>