To build a school, it was planned to allocate 3 million yuan, but actually only 2.7 million yuan was spent. What percentage was saved?
修建一所学校，计划拨款300万元，实际只用去270万元，节约了百分之几？
<gadget id="calculator">300 - 270</gadget>
<output>30</output>

<gadget id="calculator">30 / 300</gadget>
<output>1/10 = around 0.1</output>

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