What is difference between biggest and smallest fraction among 2/3, 3/4, 4/5 and 5/7
Select:	A) 2 / 15	B) 3 / 5	C) 1 / 6	D) 1 / 7	E) none of these

Rationale: explanation : 2 / 3 = . 66 , 3 / 4 = . 75 , 4 / 5 = . 8 and 5 / 7 = . 71 so biggest is 4 / 5 and smallest is 2 / 3 their difference is 4 / 5 - 2 / 3 = 2 / 15 option a
Answer: A