diff --git a/aider/analytics.py b/aider/analytics.py
index 737cae701..baae92ae4 100644
--- a/aider/analytics.py
+++ b/aider/analytics.py
@@ -97,8 +97,9 @@ class Analytics:
         if not uuid_str:
             return False
 
-        # Convert percentage to hex threshold (1% = "03", 10% = "1a", etc)
-        threshold = format(int(256 * percent / 100), "02x")
+        # Convert percentage to hex threshold (1% = "04", 10% = "1a", etc)
+        # Using first 2 hex digits (0-ff) means each digit is 1/256 of the space
+        threshold = format(int(255 * percent / 100), "02x")
         return uuid_str < threshold
 
     def get_data_file_path(self):