diff --git a/Marlin/cardreader.h b/Marlin/cardreader.h
index e5c8443f5e..679cbbcd79 100644
--- a/Marlin/cardreader.h
+++ b/Marlin/cardreader.h
@@ -38,7 +38,7 @@ public:
   FORCE_INLINE bool eof() { return sdpos>=filesize ;};
   FORCE_INLINE int16_t get() {  sdpos = file.curPosition();return (int16_t)file.read();};
   FORCE_INLINE void setIndex(long index) {sdpos = index;file.seekSet(index);};
-  FORCE_INLINE uint8_t percentDone(){if(!sdprinting) return 0; if(filesize) return sdpos*100/filesize; else return 0;};
+  FORCE_INLINE uint8_t percentDone(){if(!sdprinting) return 0; if(filesize) return sdpos/((filesize+99)/100); else return 0;};
   FORCE_INLINE char* getWorkDirName(){workDir.getFilename(filename);return filename;};
 
 public:
@@ -73,4 +73,4 @@ private:
 #define IS_SD_PRINTING (false)
 
 #endif //SDSUPPORT
-#endif
+#endif