A certain number is subtracted from the numerator and denominator of the fraction (73/136) at the same time, and the new fraction obtained is (2/9), what is the subtracted number?
分数(73/136)的分子和分母都同时减去某一个数，所得的新分数约分后是(2/9)，减去的这个数是多少．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(2/9) * 136</gadget>
<output>272/9 = around 30.222222</output>

<gadget id="calculator">73 - (272/9)</gadget>
<output>385/9 = around 42.777778</output>

<gadget id="calculator">1 - (2/9)</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">(385/9) / (7/9)</gadget>
<output>55</output>

<result>55</result>