The school actually invested 1.2 million yuan in building a comprehensive building, saving 300,000 yuan compared to the original plan. How much was the savings?
学校建综合楼实际投资120万元，比原计划节约了30万元，节约了多少
<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>