Remove the percent sign of 25%, how much this number has increased from the original.
去掉25%的百分号，这个数比原来增加了多少．
<gadget id="calculator">25 / 0.25</gadget>
<output>100</output>

<gadget id="calculator">100 - 1</gadget>
<output>99</output>

<result>99</result>