There are 85 grams of water in 100 grams of salt water, and the weight of salt is ((())/(())) of water.
100克盐水中有85克水，盐的重量是水的((())/(()))．
<gadget id="calculator">100 - 85</gadget>
<output>15</output>

<gadget id="calculator">15 / 85</gadget>
<output>3/17 = around 0.176471</output>

<result>3/17 = around 0.176471</result>