The ratio of number A to number B is 7:5, number B is equivalent to number A ((())/(())), and number A is more than number B.
甲数与乙数的比是7：5，乙数相当于甲数的是((())/(()))，甲数比乙数多多少．
<gadget id="calculator">7 - 5</gadget>
<output>2</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>