Uncle Wang's family contracted a vegetable field. The harvest of cabbage was 41.6 tons the year before last, and 52 tons of cabbage last year. How much less was the harvest the year before last than last year?
王伯伯家承包了一块菜田，前年收白菜41.6吨，去年收白菜52吨，前年比去年少收了几成？
<gadget id="calculator">52 - 41.6</gadget>
<output>10.4</output>

<gadget id="calculator">10.4 / 52</gadget>
<output>0.2</output>

<result>0.2</result>