Public sector bank, UCO Bank, on Saturday reported a 51 percent decline in its net profit to 256.7 crore rupees for the first quarter ended June 30, against the same quarter last fiscal.The Gross Non-performing Assets as a percentage of total advances increased to 7.3 percent during June quarter, from 4.3 percent in the same period last fiscal. Net non-performing assets also rose to 4.5 percent against 2.3 per cent during the same quarter last year.