D)
3/7 = 0.4285.... (recurring)
1) m/n < 0.42. Hence denominator is more than 7. (ex: 3/8). Or we take a value like 0.4 which is 2/5 and check. It is SUFF
2) m/n ^ -1 > 2.5
n/ m > 2.5
so denominator is combination of even and odd which is a non recurring decimal. so m/ n can 10/26, 2/ 5.2 so on which is also sufficient.
Hence D.
What is the OE?
3/7 = 0.4285.... (recurring)
1) m/n < 0.42. Hence denominator is more than 7. (ex: 3/8). Or we take a value like 0.4 which is 2/5 and check. It is SUFF
2) m/n ^ -1 > 2.5
n/ m > 2.5
so denominator is combination of even and odd which is a non recurring decimal. so m/ n can 10/26, 2/ 5.2 so on which is also sufficient.
Hence D.
What is the OE?
