diff --git a/aider/analytics.py b/aider/analytics.py
index 537da259e..02f6b1f92 100644
--- a/aider/analytics.py
+++ b/aider/analytics.py
@@ -78,11 +78,28 @@ class Analytics:
         if not self.user_id:
             return False
 
-        # Define percentage of users to ask
         PERCENT = 1
+        return self.is_uuid_in_percentage(self.user_id, PERCENT)
+
+    def is_uuid_in_percentage(self, uuid_str, percent):
+        """Check if a UUID string falls within the first X percent of the UUID space.
+        
+        Args:
+            uuid_str: UUID string to test
+            percent: Percentage threshold (0-100)
+            
+        Returns:
+            bool: True if UUID falls within the first X percent
+        """
+        if not (0 <= percent <= 100):
+            raise ValueError("Percentage must be between 0 and 100")
+            
+        if not uuid_str:
+            return False
+            
         # Convert percentage to hex threshold (1% = "03", 10% = "1a", etc)
-        threshold = format(int(256 * PERCENT / 100), "02x")
-        return self.user_id < threshold
+        threshold = format(int(256 * percent / 100), "02x")
+        return uuid_str < threshold
 
     def get_data_file_path(self):
         data_file = Path.home() / ".aider" / "analytics.json"
diff --git a/tests/basic/test_analytics.py b/tests/basic/test_analytics.py
index baeb21ddc..9d7df7167 100644
--- a/tests/basic/test_analytics.py
+++ b/tests/basic/test_analytics.py
@@ -105,3 +105,33 @@ def test_need_to_ask(temp_data_dir):
 
     analytics.permanently_disable = True
     assert analytics.need_to_ask(True) is False
+
+
+def test_is_uuid_in_percentage():
+    analytics = Analytics()
+    
+    # Test basic percentage thresholds
+    assert analytics.is_uuid_in_percentage("00", 1) is True
+    assert analytics.is_uuid_in_percentage("02", 1) is True
+    assert analytics.is_uuid_in_percentage("03", 1) is False
+    assert analytics.is_uuid_in_percentage("ff", 1) is False
+    
+    assert analytics.is_uuid_in_percentage("00", 10) is True
+    assert analytics.is_uuid_in_percentage("19", 10) is True
+    assert analytics.is_uuid_in_percentage("1a", 10) is False
+    assert analytics.is_uuid_in_percentage("ff", 10) is False
+    
+    # Test edge cases
+    assert analytics.is_uuid_in_percentage("00", 0) is False
+    assert analytics.is_uuid_in_percentage("00", 100) is True
+    assert analytics.is_uuid_in_percentage("ff", 100) is True
+    
+    # Test invalid inputs
+    with pytest.raises(ValueError):
+        analytics.is_uuid_in_percentage("00", -1)
+    with pytest.raises(ValueError):
+        analytics.is_uuid_in_percentage("00", 101)
+    
+    # Test empty/None UUID
+    assert analytics.is_uuid_in_percentage("", 50) is False
+    assert analytics.is_uuid_in_percentage(None, 50) is False