The number of A is twice the number of B, how much more is A than B? (fill in percentage)
甲数是乙数的2倍，甲比乙多多少．(填百分数)
<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">1 / 1</gadget>
<output>1</output>

<result>1</result>