A power plant planned to burn 80 tons of coal last month, but actually saved 8 tons compared to the plan. What percentage of the plan does the actual tonnage of coal burnt account for?
某电厂上个月计划烧煤80吨，实际比计划节约了8吨．实际烧煤吨数占计划的百分之几？
<gadget id="calculator">80 - 8</gadget>
<output>72</output>

<gadget id="calculator">72 / 80</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>