Xiao Hua's height is 115% of Xiao Ming's, how much is Xiao Hua heavier than Xiao Ming?
小华身高是小明的115%，小华比小明重多少．
<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>