diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index b8d86d9e295fe..fa85c54eb42fa 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -7792,7 +7792,7 @@ def _get_agg_axis(self, axis_num):
         elif axis_num == 1:
             return self.index
         else:
-            raise ValueError("Axis must be 0 or 1 (got %r)" % axis_num)
+            raise ValueError(f"Axis must be 0 or 1 (got {repr(axis_num)})")
 
     def mode(self, axis=0, numeric_only=False, dropna=True):
         """
diff --git a/pandas/core/indexes/numeric.py b/pandas/core/indexes/numeric.py
index 7ab08040e51a7..536a1fb6ae243 100644
--- a/pandas/core/indexes/numeric.py
+++ b/pandas/core/indexes/numeric.py
@@ -122,18 +122,16 @@ def _convert_tolerance(self, tolerance, target):
             if tolerance.ndim > 0:
                 raise ValueError(
                     (
-                        "tolerance argument for %s must contain "
+                        f"tolerance argument for {type(self).__name__} must contain "
                         "numeric elements if it is list type"
                     )
-                    % (type(self).__name__,)
                 )
             else:
                 raise ValueError(
                     (
-                        "tolerance argument for %s must be numeric "
-                        "if it is a scalar: %r"
+                        f"tolerance argument for {type(self).__name__} must be numeric "
+                        f"if it is a scalar: {repr(tolerance)}"
                     )
-                    % (type(self).__name__, tolerance)
                 )
         return tolerance