Fenghua Trading Co. planned sales of 250 million yuan last year, but actually reached 320 million yuan. By what percentage was it overfulfilled?
丰华贸易公司去年计划销售额是2.5亿元，实际达到3.2亿元．超额完成了百分之几？
<gadget id="calculator">3.2 - 2.5</gadget>
<output>0.7</output>

<gadget id="calculator">0.7 / 2.5</gadget>
<output>0.28</output>

<result>0.28</result>