This year's grain output is 115% of last year's. How much is this year's grain output higher than last year's?
今年的粮食产量是去年的115%，今年的粮食产量比去年增产多少．
<gadget id="calculator">115 / 100</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">(23/20) - 1</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>