Water accounts for 75% of sugar water, and how much sugar accounts for sugar water.
水占糖水的75%，糖占糖水的多少．
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>