The actual investment in the comprehensive building of the Central Primary School is 2.3 million yuan, which is 200,000 yuan less than the plan. How much is the savings?
中心小学综合楼实际投资230万元，比计划节约了20万元，节约了百分之几？
<gadget id="calculator">230 + 20</gadget>
<output>250</output>

<gadget id="calculator">20 / 250</gadget>
<output>2/25 = around 0.08</output>

<result>2/25 = around 0.08</result>