If ((a)/(b))=(2/3), then what is the value of ((ab)/(b)) -
若((a)/(b))=(2/3)，则((a-b)/(b))的值是-多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>