diff --git a/src/PIL/ImImagePlugin.py b/src/PIL/ImImagePlugin.py
index f9f47348c..b4215a0b1 100644
--- a/src/PIL/ImImagePlugin.py
+++ b/src/PIL/ImImagePlugin.py
@@ -357,7 +357,7 @@ def _save(im: Image.Image, fp: IO[bytes], filename: str | bytes) -> None:
         name = "".join([name[: 92 - len(ext)], ext])
 
         fp.write(f"Name: {name}\r\n".encode("ascii"))
-    fp.write(("Image size (x*y): %d*%d\r\n" % im.size).encode("ascii"))
+    fp.write(f"Image size (x*y): {im.size[0]}*{im.size[1]}\r\n".encode("ascii"))
     fp.write(f"File size (no of images): {frames}\r\n".encode("ascii"))
     if im.mode in ["P", "PA"]:
         fp.write(b"Lut: 1\r\n")
diff --git a/src/PIL/Image.py b/src/PIL/Image.py
index 9b76ce8bd..1e289b6c3 100644
--- a/src/PIL/Image.py
+++ b/src/PIL/Image.py
@@ -692,13 +692,10 @@ class Image:
         )
 
     def __repr__(self) -> str:
-        return "<%s.%s image mode=%s size=%dx%d at 0x%X>" % (
-            self.__class__.__module__,
-            self.__class__.__name__,
-            self.mode,
-            self.size[0],
-            self.size[1],
-            id(self),
+        return (
+            f"<{self.__class__.__module__}.{self.__class__.__name__} "
+            f"image mode={self.mode} size={self.size[0]}x{self.size[1]} "
+            f"at 0x{id(self):X}>"
         )
 
     def _repr_pretty_(self, p: PrettyPrinter, cycle: bool) -> None:
@@ -707,14 +704,8 @@ class Image:
         # Same as __repr__ but without unpredictable id(self),
         # to keep Jupyter notebook `text/plain` output stable.
         p.text(
-            "<%s.%s image mode=%s size=%dx%d>"
-            % (
-                self.__class__.__module__,
-                self.__class__.__name__,
-                self.mode,
-                self.size[0],
-                self.size[1],
-            )
+            f"<{self.__class__.__module__}.{self.__class__.__name__} "
+            f"image mode={self.mode} size={self.size[0]}x{self.size[1]}>"
         )
 
     def _repr_image(self, image_format: str, **kwargs: Any) -> bytes | None:
diff --git a/src/PIL/JpegImagePlugin.py b/src/PIL/JpegImagePlugin.py
index 6510e072e..ab6a2f497 100644
--- a/src/PIL/JpegImagePlugin.py
+++ b/src/PIL/JpegImagePlugin.py
@@ -72,7 +72,7 @@ def APP(self: JpegImageFile, marker: int) -> None:
     n = i16(self.fp.read(2)) - 2
     s = ImageFile._safe_read(self.fp, n)
 
-    app = "APP%d" % (marker & 15)
+    app = f"APP{marker & 15}"
 
     self.app[app] = s  # compatibility
     self.applist.append((app, s))
diff --git a/src/PIL/PcxImagePlugin.py b/src/PIL/PcxImagePlugin.py
index 8445d5cc7..32436cea3 100644
--- a/src/PIL/PcxImagePlugin.py
+++ b/src/PIL/PcxImagePlugin.py
@@ -86,7 +86,7 @@ class PcxImageFile(ImageFile.ImageFile):
 
         elif bits == 1 and planes in (2, 4):
             mode = "P"
-            rawmode = "P;%dL" % planes
+            rawmode = f"P;{planes}L"
             self.palette = ImagePalette.raw("RGB", s[16:64])
 
         elif version == 5 and bits == 8 and planes == 1:
diff --git a/src/PIL/PngImagePlugin.py b/src/PIL/PngImagePlugin.py
index 4e1227204..4b97992a3 100644
--- a/src/PIL/PngImagePlugin.py
+++ b/src/PIL/PngImagePlugin.py
@@ -523,7 +523,7 @@ class PngStream(ChunkStream):
 
         assert self.fp is not None
         s = ImageFile._safe_read(self.fp, length)
-        raw_vals = struct.unpack(">%dI" % (len(s) // 4), s)
+        raw_vals = struct.unpack(f">{len(s) // 4}I", s)
         self.im_info["chromaticity"] = tuple(elt / 100000.0 for elt in raw_vals)
         return s
 
diff --git a/src/PIL/TiffImagePlugin.py b/src/PIL/TiffImagePlugin.py
index 08bb78915..9ee55347a 100644
--- a/src/PIL/TiffImagePlugin.py
+++ b/src/PIL/TiffImagePlugin.py
@@ -935,9 +935,9 @@ class ImageFileDirectory_v2(_IFDv2Base):
                 self._tagdata[tag] = data
                 self.tagtype[tag] = typ
 
-                msg += " - value: " + (
-                    "<table: %d bytes>" % size if size > 32 else repr(data)
-                )
+                bytes_value = size if size > 32 else repr(data)
+                msg += f" - value: <table: {bytes_value} bytes>"
+
                 logger.debug(msg)
 
             (self.next,) = (
@@ -981,9 +981,10 @@ class ImageFileDirectory_v2(_IFDv2Base):
 
             tagname = TiffTags.lookup(tag, self.group).name
             typname = "ifd" if is_ifd else TYPES.get(typ, "unknown")
-            msg = f"save: {tagname} ({tag}) - type: {typname} ({typ})"
-            msg += " - value: " + (
-                "<table: %d bytes>" % len(data) if len(data) >= 16 else str(values)
+            bytes_value = len(data) if len(data) >= 16 else str(values)
+            msg = (
+                f"save: {tagname} ({tag}) - type: {typname} ({typ})"
+                f" - value: <table: {bytes_value} bytes>"
             )
             logger.debug(msg)
 
diff --git a/src/PIL/_typing.py b/src/PIL/_typing.py
index 335804b79..34a9a81e1 100644
--- a/src/PIL/_typing.py
+++ b/src/PIL/_typing.py
@@ -44,7 +44,7 @@ _T_co = TypeVar("_T_co", covariant=True)
 
 
 class SupportsRead(Protocol[_T_co]):
-    def read(self, __length: int = ...) -> _T_co: ...
+    def read(self, length: int = ..., /) -> _T_co: ...
 
 
 StrOrBytesPath = Union[str, bytes, os.PathLike[str], os.PathLike[bytes]]