If a/b = 4/5, Then (5a - 3b) / (5a + 3b) = ?	Choose the most appropriate option.
A) 4  B) 2/3  C) 3  D) 1  E) 1/7
Answer   Dividing numerator as well as denominator by b, we get   Given Exp. = (5a - 3b) / (5a + 3b) = (5a/b - 3) / (5a/b + 3)   Since a/b = 4/5   this implies that   =[(5*4)/5 -3]/[(5*4)/5 +3)]   = (4- 3) / (4 + 3)   = 1/7   Option: 1/7
<result>E</result>
If a/b = 4/5, Then (5a - 3b) / (5a + 3b) = ?