The number A is 2 more than 12.5% of the number B, the number A is 30, find the number B. (in arithmetic)
甲数比乙数的12.5%多2，甲数是30，求乙数．(用算术方法)
<gadget id="calculator">30 - 2</gadget>
<output>28</output>

<gadget id="calculator">12.5 / 100</gadget>
<output>0.125</output>

<gadget id="calculator">28 / 0.125</gadget>
<output>224</output>

<result>224</result>