The per capita income of Xiaokang Village this year is 5,500 yuan, an increase of (1/10) compared with last year. How much was the per capita income of Xiaokang Village last year?
小康村今年人均收入5500元，比去年增加了(1/10)，小康村去年的人均收入是多少元？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">5_500 / (11/10)</gadget>
<output>5_000</output>

<result>5_000</result>