simplest true fraction ((a)/(b)), satisfying (1/8)<((a)/(b))<(1/7), when b is the smallest two-digit number, a+ b = how much.
一个最简真分数((a)/(b))，满足(1/8)＜((a)/(b))＜(1/7)，当b为最小的两位数时，a+b=多少．
<gadget id="calculator">2 + 15</gadget>
<output>17</output>

<result>17</result>