The store ships peaches and apples, and the weight ratio of peaches to apples is 5:7. What is the weight of apples in the total of these two kinds of fruits?
商店运来桃和苹果，桃和苹果的重量比是5：7，那么苹果重量占这两种水果总量的多少．
<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<result>7/12 = around 0.583333</result>