To build a factory building, the actual investment is 200,000 yuan, which saves 50,000 yuan compared with the plan. How much is the savings?
修建一座厂房，实际投资20万元，比计划节约了5万元，节约了百分之几？
<gadget id="calculator">20 + 5</gadget>
<output>25</output>

<gadget id="calculator">5 / 25</gadget>
<output>1/5 = around 0.2</output>

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