Solve the equation: (3/8)x: (2/5)=((15/16)x-1):(8/9).
解方程：(3/8)x：(2/5)=((15/16)x-1)：(8/9)．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">15 / 16</gadget>
<output>15/16 = around 0.9375</output>

<gadget id="calculator">(2/5) * (15/16)</gadget>
<output>3/8 = around 0.375</output>

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

<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">(3/8) * (8/9)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(3/8) - (1/3)</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">(2/5) / (1/24)</gadget>
<output>48/5 = around 9.6</output>

<result>48/5 = around 9.6</result>