The construction of the teaching building in the new primary school cost 900,000 yuan, which was 100,000 yuan less than planned. How much was the savings?
新建小学修建教学楼用去90万元，比计划节约了10万元，节约了百分之几？
<gadget id="calculator">10 + 90</gadget>
<output>100</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

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