A primary school invested 4.2 million yuan in the construction of a teaching building, saving 600,000 yuan compared to the original plan. How many percent did the actual investment save compared to the plan?
某小学投资420万元修建了一座教学楼，比原计划节约了60万元，实际投资比计划节省百分之几？
<gadget id="calculator">420 + 60</gadget>
<output>480</output>

<gadget id="calculator">60 / 480</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>