CAIRO, Oct 11 (Reuters) - Egyptian payments firm e-finance for Digital and Financial Investments has raised its institutional share offering to 23.5% of the company’s total eventual capital after strong demand, one of the managers of the offering said on Monday. The state-controlled firm is offering shares to institutional investors in a sale that closes at 15:00 GMT on Monday. A smaller one-week offering to retail investors began on Sunday. Reporting by Patrick Werr Editing by Aidan Lewis Our Standards: The Thomson Reuters Trust Principles.