Update README.md

Author: Sven97

README.md

@@ -2,7 +2,7 @@
   <a href="https://github.com/Sven97/Introduction-to-Java-Programming-and-Data-Structures-11th-Edition/"><img src="https://www.pearsonhighered.com/assets/bigcovers/0/1/3/4/0134694511.jpg" height="300" title="Cover" alt="Cover"></a>
 </p>
 <p align="center">
-<img src="https://img.shields.io/badge/completion-71%25-blue.svg" />
+<img src="https://img.shields.io/badge/completion-17%25-blue.svg" />
   <a href="https://github.com/Sven97/Introduction-to-Java-Programming-and-Data-Structures-11th-Edition/graphs/contributors" alt="Contributors">
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