to find out rational number between 3/5 and 5/7, since i was not able to arrive correct answer, than seen the answer and found out that you have solved question by opting correct alternate answer first i.e. 5/8. My question is this how you can arrive that 5/8 is correct answer, as there were 3 more options are also there. If I will opt your way of solving this question than I will land up in spending too much time in this question only...so this is not the way of solving in competitive exams where we have less time.