The canteen of Gaoqiao Elementary School burns 5 tons of coal in September and 6 tons in October. How much more is burned in October than in September? Which of the following formulas is incorrect
高桥小学食堂九月烧煤5吨，十月烧煤6吨，十月比九月多烧百分之几？下面哪个算式是错误的多少
<gadget id="calculator">6 - 5</gadget>
<output>1</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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