A machine manufacturing plant originally planned to use 80 tons of steel in May, but actually used 68 tons of steel. What percentage was actually saved?
一个机器制造厂五月份原计划用钢材80吨，实际用钢材68吨，实际节约了百分之几？
<gadget id="calculator">80 - 68</gadget>
<output>12</output>

<gadget id="calculator">12 / 80</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>