diff --git a/backend/app/services/excel_export.py b/backend/app/services/excel_export.py
index c875c05..7b72164 100644
--- a/backend/app/services/excel_export.py
+++ b/backend/app/services/excel_export.py
@@ -30,7 +30,7 @@ HEADER_FILL = PatternFill(start_color="FFD9D9D9", end_color="FFD9D9D9", fill_typ
 BOLD_FONT = Font(bold=True)
 HEADER_FONT = Font(bold=True, name="Calibri", size=11)
 TITLE_FONT = Font(bold=True, name="Calibri", size=12)
-PCT_FORMAT = "0%"
+PCT_FORMAT = "0.0%"
 
 # Fallgruppe keys in canonical order
 FALLGRUPPEN = ["onko", "kardio", "intensiv", "galle", "sd"]