15 grams of salt is dissolved in 45 grams of water. At this time, the salt is ((())/(())) of the water. How much is the salt in the salt water?
15克盐溶解在45克水中，这时盐是水的((())/(()))，盐占盐水的多少．
<gadget id="calculator">15 + 45</gadget>
<output>60</output>

<gadget id="calculator">15 / 60</gadget>
<output>1/4 = around 0.25</output>

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