Xiaofei’s family used to use about 12 tons of water per month, but after replacing the water-saving faucet, it saved 1.2 tons of water per month. How much is the monthly water saving compared to the original?
小飞家原来每月用水约12吨，更换了节水龙头后每月用水节约1.2吨，每月用水比原来节约了百分之几？
<gadget id="calculator">1.2 / 12</gadget>
<output>0.1</output>

<result>0.1</result>