There is a simple fraction, if the numerator is added by 1 to get 1, if the denominator is added by 1 to get (3/4), what is the original fraction?
有一个最简分数，如果分子加1后得1，如果分母加1后得(3/4)，原分数是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) + (3/4)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/2) / (1/4)</gadget>
<output>6</output>

<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<gadget id="calculator">(3/2) / (1/4) / 7</gadget>
<output>6/7 = around 0.857143</output>

<result>6/7 = around 0.857143</result>