Xiaoming's family used 15 tons of water in April, and saved 3 tons in May compared with April. How much was the saving in May compared with April?
小明家四月份用水15吨，五月份比四月份节约3吨，五月份比四月份节约了几分之几？
<gadget id="calculator">3 / 15</gadget>
<output>1/5 = around 0.2</output>

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