If 5 kg of salt is put into 20 kg of water, what is the percentage of salt in the salt water?
把5千克的盐放入20千克的水中，那么盐占盐水的多少
<gadget id="calculator">5 / 25</gadget>
<output>1/5 = around 0.2</output>

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