This year's output is less than last year's (1/10), and this year's output is equivalent to last year's.
今年的产量比去年少(1/10)，今年的产量就相当于去年的多少．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

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