A sugar factory produced 552 tons of sugar in July, which was 72 tons more than planned. By what percentage?
某糖厂七月生产552吨糖，比计划多生产72吨，超产百分之几？
<gadget id="calculator">552 - 72</gadget>
<output>480</output>

<gadget id="calculator">72 / 480</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>