(9/10)*(5/12)+(2/3)x=(5/6).
(9/10)*(5/12)+(2/3)x=(5/6)．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">(9/10) * (5/12)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(5/6) - (3/8)</gadget>
<output>11/24 = around 0.458333</output>

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

<gadget id="calculator">(11/24) / (2/3)</gadget>
<output>11/16 = around 0.6875</output>

<result>11/16 = around 0.6875</result>