To build an office building, the original planned cost is 1.25 million yuan, but the actual cost is 1 million yuan. How much is the reduction?
建一幢办公大楼，原计划造价125万元，实际造价100万元，减少了百分之几？
<gadget id="calculator">125 - 100</gadget>
<output>25</output>

<gadget id="calculator">25 / 125</gadget>
<output>1/5 = around 0.2</output>

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