A and B are both boxes containing black and white chess pieces. The number of chess pieces in box A is (2/3) of the number of chess pieces in box B, the number of black chess pieces in box A is (3/8) of the number of chess pieces in box A, and the number of black chess pieces in box B is (8) of the number of chess pieces in box B /15), what percentage of the total number of white chess pieces in the two boxes account for the total number of chess pieces in the two boxes?
甲乙两个盒子都装有黑白两色棋子．甲盒棋子数是乙盒棋子数的(2/3)，甲盒中黑棋子数是甲盒中棋子数的(3/8)，乙盒中黑棋子数是乙盒中棋子数的(8/15)，求两盒子的白棋子合起来占两盒子棋子总数的百分之几？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(2/3) / (5/3)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(2/5) * (5/8)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">1 - (8/15)</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">(3/5) * (7/15)</gadget>
<output>7/25 = around 0.28</output>

<gadget id="calculator">(1/4) + (7/25)</gadget>
<output>53/100 = around 0.53</output>

<result>53/100 = around 0.53</result>