Given an event rate @1 year=7% and a kaplan meier survival estimate for the same event @1 year =8.5%, is it possible (and how) to back calculate n(%) of subjects censored before 1 year, e.g lost at follow-up/not completing study? Thank you

Given an event rate at 1 year= 7% and a Kaplan Meier survival estimate for the same event at 1 year = 8.5%, is it possible (and how) to back calculate n(%) of subjects censored before 1 year, e.g lost at follow-up/not completing study?