(3/8)/(x-(3/4))=(9/10).
(3/8)/(x-(3/4))=(9/10)．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

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

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(9/10) * (3/4)</gadget>
<output>27/40 = around 0.675</output>

<gadget id="calculator">(3/8) + (27/40)</gadget>
<output>21/20 = around 1.05</output>

<gadget id="calculator">(21/20) / (9/10)</gadget>
<output>7/6 = around 1.166667</output>

<result>7/6 = around 1.166667</result>