20% of the number A is equal to 25% of the number B, the number B is 100, what is the number A?
甲数的20%等于乙数的25%，乙数是100，甲数是多少．
<gadget id="calculator">25 / 20</gadget>
<output>5/4 = around 1.25</output>

<result>5/4 = around 1.25</result>