Xiaofang's family spent 700 yuan last month and 630 yuan this month. How much was the savings?
小芳家上个月开支700元，这个月开支630元，节约了百分之几？
<gadget id="calculator">700 - 630</gadget>
<output>70</output>

<gadget id="calculator">70 / 700</gadget>
<output>1/10 = around 0.1</output>

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