The fraction ((b)/(a)) is greater than (1/8) and less than (1/5), the numerator b is a one-digit prime number, and the denominator a is a two-digit prime number. How many such fractions ((b)/(a)) are there?
分数((b)/(a))大于(1/8)且小于(1/5)，分子b是一位数的质数，分母a是两位数的质数．这样的分数((b)/(a))共有多少个．
<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<result>5</result>