Originally planned to invest 10 million yuan to build a primary school, but actually spent 12 million yuan, what percentage increase the investment?
原计划投资1000万元建一所小学，实际用去1200万元，增加投资百分之几？
<gadget id="calculator">1_200 - 1_000</gadget>
<output>200</output>

<gadget id="calculator">200 / 1_000</gadget>
<output>1/5 = around 0.2</output>

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