diff --git a/thin-provisioning/thin_show_duplicates.cc b/thin-provisioning/thin_show_duplicates.cc
index 04f8150..12d3490 100644
--- a/thin-provisioning/thin_show_duplicates.cc
+++ b/thin-provisioning/thin_show_duplicates.cc
@@ -191,6 +191,7 @@ namespace {
 		}
 
 		cout << "\n\ntotal dups: " << detector.get_total_duplicates() << endl;
+		cout << (detector.get_total_duplicates() * 100) / nr_blocks << "% duplicates\n";
 
 		return 0;
 	}