For a project, the planned investment is 200,000 yuan, but the actual investment is 20,000 yuan less than the plan. What percentage of the actual investment is equal to the plan?
一项工程，计划投资20万元，实际投资比计划节约了2万元，实际投资相当于计划的百分之几？
<gadget id="calculator">20 - 2</gadget>
<output>18</output>

<gadget id="calculator">18 / 20</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>