If the number of boys is 15% greater than the number of girls, then the number of boys is the number of girls.
男生人数比女生人数多15%，则男生人数是女生人数的多少．
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<result>23/20 = around 1.15</result>