A fraction, if 8 is added to the numerator, it will be equal to (1/2) after simplification; if 5 is added to the denominator, it will be equal to (1/5) after simplification, then what is the original fraction.
一个分数，如果分子加上8，化简后等于(1/2)；如果分母加上5，化简后等于(1/5)，那么原来的分数是多少．
<gadget id="calculator">7 / 30</gadget>
<output>7/30 = around 0.233333</output>

<result>7/30 = around 0.233333</result>