diff --git a/tools/analyse.cpp b/tools/analyse.cpp
index 75d9133..fc4f314 100644
--- a/tools/analyse.cpp
+++ b/tools/analyse.cpp
@@ -161,7 +161,7 @@ int main (int argc, char const **argv)
     );
 
     auto const duplicated_bytes = total_bytes - unique_bytes;
-    float const duplicated_fraction = float (duplicated_bytes) / total_bytes;
+    float const duplicated_fraction = 100.f * duplicated_bytes / total_bytes;
 
     std::cout << duplicated_bytes << " duplicated bytes  of " << total_bytes << " (" << duplicated_fraction << "%)\n";
     std::cout << (src.elements.size () - unique.size ()) << " duplicates\n";