fraction is reduced to (2/3). If the numerator of this fraction subtracts 18. Subtract 22 from the denominator to get a new fraction (3/5). So, what was the original score before the approximation.
一个分数约分后是(2/3)．如果这个分数的分子减去18．分母减去22，约分后就可以得到一个新的分数(3/5)．那么，原来的分数在约分前是多少．
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

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

<gadget id="calculator">72 / 72</gadget>
<output>1</output>

<gadget id="calculator">(2/3) * 1</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>