diff --git a/benchmark/problem_stats.py b/benchmark/problem_stats.py
index 80c5316a3..f5c2a4e66 100755
--- a/benchmark/problem_stats.py
+++ b/benchmark/problem_stats.py
@@ -33,7 +33,7 @@ def analyze_exercise_solutions(topn=None):
 
     # Sort models by pass rate to get top N if specified
     if topn:
-        leaderboard.sort(key=lambda x: float(x.get("pass_rate_2", "0").rstrip("%")), reverse=True)
+        leaderboard.sort(key=lambda x: float(x.get("pass_rate_2", 0)), reverse=True)
         leaderboard = leaderboard[:topn]
 
     # Get all exercise names from a complete run