An experimental primary school invested 2.28 million yuan to build a science and technology museum, saving 120,000 yuan compared with the original plan. What percentage did you save?
某实验小学投资228万元建造一个科技馆，比原计划节省了12万元．节省了百分之几？
<gadget id="calculator">228 + 12</gadget>
<output>240</output>

<gadget id="calculator">12 / 240</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>