A machine tool factory originally planned to produce 80 machine tools in the first quarter of 2011, but actually produced 92. What percentage is the actual increase in production compared with the original plan?
某机床厂2011年第一季度原计划生产80台机床，实际生产了92台．实际比原计划增产百分之几？
<gadget id="calculator">92 - 80</gadget>
<output>12</output>

<gadget id="calculator">12 / 80</gadget>
<output>3/20 = around 0.15</output>

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

<gadget id="calculator">(3/20) * 1</gadget>
<output>3/20 = around 0.15</output>

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