If ((a)/(b))=(3/8), what is the value of ((a)/(a+b)).
若((a)/(b))=(3/8)，则((a)/(a+b))的值是多少．
<gadget id="calculator">3 / 11</gadget>
<output>3/11 = around 0.272727</output>

<result>3/11 = around 0.272727</result>