To build a factory building, the actual investment is 2.25 million yuan, which is 250,000 yuan less than the original plan. How much is the actual savings compared to the original plan?
建一座厂房，实际投资225万元，比原计划节约25万元，实际比原计划节约几分之几？
<gadget id="calculator">225 + 25</gadget>
<output>250</output>

<gadget id="calculator">25 / 250</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>