Owing to a fall in net interest income (NII), state-run Dena Bank's net profit declined by 70 per cent to Rs 56 crore in the fourth quarter ended March 31, 2015 on a year-on-year (y-o-y) basis. Net profit in the year-ago quarter was Rs 127 crore. The fall in NII - from Rs 614 crore to Rs 609 crore, was due to tepid growth in credit and reversal of interest income for bad loans.