Original sentence: The introduction of the forint in 1 August 1946 was a crucial step of the post-WWII stabilization of the Hungarian economy, and the currency remained relatively stable until the 1980's.Transition to market economy in the early 1990's deteriorated the value of the forint, inflation peaked at 35% in 1991
Edited sentence: The introduction of the forint in 1 August 1946 was a crucial step of the post-WWII stabilization of the Hungarian economy, and the currency remained relatively stable until the 1980s.Transition to market economy in the early 1990s deteriorated the value of the forint, inflation peaked at 35% in 1991