(2/3) of number A is equal to 40% of number B, and number A is ((())/(())) of number B.
甲数的(2/3)等于乙数的40%，甲数是乙数的((())/(()))．
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/5) / (2/3)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>