The actual investment in a project is 1.2 million yuan, which is 300,000 yuan less than the original plan. What percentage is the actual savings?
一项工程，实际投资120万元，比原计划节约了30万元，请问实际节约了百分之几？
<gadget id="calculator">120 + 30</gadget>
<output>150</output>

<gadget id="calculator">30 / 150</gadget>
<output>1/5 = around 0.2</output>

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