There is a fraction which is greater than (3/4) but less than (4/5) and the denominator is a single digit. What is the fraction?
有一个分数，它比(3/4)大，但比(4/5)小，且分母是一位数，这个分数是多少．
<gadget id="calculator">140 / 180</gadget>
<output>7/9 = around 0.777778</output>

<result>7/9 = around 0.777778</result>