The number A is 80, which is 20 less than the number B. The number A is the number B ((())/(())), and the number B is more than the number A.
甲数是80，比乙数少20，甲数是乙数的((())/(()))，乙数比甲数多多少．
<gadget id="calculator">20 / 80</gadget>
<output>1/4 = around 0.25</output>

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