A 77-year-old former investment banker has been sworn in as Peru’s new president at a ceremony in Lima.In his inaugural speech, Pedro Pablo Kuczynski - known as PPK - said he longed for Peru in five years ‘to be more modern, more just, more equal’.The conservative beat Keiko Fujimori in run-off elections last month.Peru`s economy has risen sharply in recent years fuelled by a commodities boom but many Peruvians live in poverty and lack basic services.Mr Kuczynski has pledged to work for all Peruvians, calling for a ‘social revolution’.He will need support from Ms Fujimori’s party to enact reforms, however, since it controls congress.Ms Fujimori, the daughter of incarcerated ex-President Alberto Fujimori, was once favourite to win the vote but eventually lost by less than a quarter of a percentage point