(5/8) of the number A is equal to (4/7) of the number B, and the number A accounts for ((())/(())) of the sum of A and B.
甲数的(5/8)等于乙数的(4/7)，甲数占甲乙和的((())/(()))．
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(4/7) / (5/8)</gadget>
<output>32/35 = around 0.914286</output>

<gadget id="calculator">(32/35) + 1</gadget>
<output>67/35 = around 1.914286</output>

<gadget id="calculator">(4/7) / (5/8) / (67/35)</gadget>
<output>32/67 = around 0.477612</output>

<result>32/67 = around 0.477612</result>