President Milei of Argentina took office just 10 months ago when monthly (not annual) inflation was at a massive 25.5%. This means that every week your groceries cost 6% more than the week before. Within that one month they cost a quarter more.
Monthly inflation has now dropped to 2.7%. Still too high by our standards, but almost a miracle for Argentina.
Milei haș done it by austerity and deregulation. He abolished various ministries. After 13 years of deficits he achieved a surplus in six months.