Put 15 grams of sugar in 100 grams of clear water, then the sugar is a fraction of the sugar water.
100克清水中放入15克糖，那么糖是糖水的几分之几多少．
<gadget id="calculator">100 + 15</gadget>
<output>115</output>

<gadget id="calculator">15 / 115</gadget>
<output>3/23 = around 0.130435</output>

<result>3/23 = around 0.130435</result>