How to claim relief u/s 89, when arrears received is split into two installments?

Saroj Kumar (bank manager) (25 Points)

30 July 2016  
I received salary arrears which were split into two installments (rcvd in different Fin. Year's). I claimed relief u/s 89 for first installment in previous Fin. Year. Now i received balanced arrears in FY 2015-16. How to calculate relief in such a situation.