The gas bill of the school cafeteria in April is (1/10) less than that in March, and the gas bill in April is ((())/(())) in March.
学校食堂四月份的煤气费比三月份节约(1/10)，四月份的煤气费是三月份的((())/(()))．
<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>