NY -- Standard&Poor's CreditWire 12/20/96 -- Standard&Poor's today has raised its corporate credit rating and senior unsecured debt rating on ConAgra Inc. to triple-`B'-plus from triple-`B' and has raised its subordinated debt rating to triple-`B' from triple-`B'-minus. Also, Standard&Poor's has raised the preferred stock rating on subsidiary ConAgra Capital L.C. to triple-`B' from triple-`B'-minus. In addition, Standard&Poor's has affirmed its `A-2' commercial paper rating on ConAgra. The ratings outlook is now stable. Approximately $5.1 billion of total debt is outstanding. The upgrade reflects the continued gradual improvement in ConAgra's financial profile. The ratings reflect relatively low business risk, derived from a diverse portfolio of leading packaged-food brands, and its major positions in