PORTLAND, Maine — Maine Medical Center on Tuesday afternoon announced a slate of personnel and payroll cuts, including the elimination of 175 positions, layoffs of 50 employees and 12.5 percent reductions in compensation for top hospital administrators. According to a hospital announcement, the institution faced a late fiscal year 2013 budget gap triggered by reductions in payments from the government and commercial payers, as well as an increase in care for patients who cannot afford to pay, among other factors. That financial shortfall reached approximately $15 million for the fiscal year that runs from Oct. 1, 2012, to Sept. 30 of this year, according to an internal hospital memo provided by the institution to the Bangor Daily News in June.