120% of the plan was actually completed, and how much more was actually completed than the plan.
实际完成计划的120%，实际比计划多完成多少．
<gadget id="calculator">120 / 100</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(6/5) - 1</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>