Both a and b are odd numbers less than 20. If ((b)/(a)) is the largest true fraction, then ((b)/(a))=what.
a和b都是小于20的奇数，要使((b)/(a))是一个最大的真分数，则((b)/(a))=多少．
<gadget id="calculator">17 / 19</gadget>
<output>17/19 = around 0.894737</output>

<result>17/19 = around 0.894737</result>