A certain orchard harvested 30 tons of apples last year, and 36 tons this year. What percentage is the increase this year compared to last year?
某果园去年收获苹果30吨，今年收获苹果36吨，今年比去年增加了百分之几？
<gadget id="calculator">36 - 30</gadget>
<output>6</output>

<gadget id="calculator">6 / 30</gadget>
<output>1/5 = around 0.2</output>

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