The sum of the numerator and denominator of a fraction is 6. If 3 is added to the numerator and denominator of this fraction to get (1/2), what is the original fraction?
一个分数的分子与分母的和是6，如果把这个分数的分子和分母都加上3得(1/2)，原来这个分数是多少．
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">8 - 3</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>