diff --git a/.changeset/silly-numbers-collect.md b/.changeset/silly-numbers-collect.md
new file mode 100644
index 0000000..5ed84a1
--- /dev/null
+++ b/.changeset/silly-numbers-collect.md
@@ -0,0 +1,5 @@
+---
+"sonda": patch
+---
+
+Round module type percentages to two decimal places
diff --git a/packages/html-report/src/components/Dialogs/OutputDialog.svelte b/packages/html-report/src/components/Dialogs/OutputDialog.svelte
index 750b4be..3a2b731 100644
--- a/packages/html-report/src/components/Dialogs/OutputDialog.svelte
+++ b/packages/html-report/src/components/Dialogs/OutputDialog.svelte
@@ -87,9 +87,9 @@ const formats = $derived.by( () => {
 	return formats;
 } );
 
-const esmPercentage = $derived( Math.round( formats.esm / data.uncompressed * 100 ) );
-const cjsPercentage = $derived( Math.round( formats.cjs / data.uncompressed * 100 ));
-const unknownPercentage = $derived( Math.round( formats.unknown / data.uncompressed * 100 ) );
+const esmPercentage = $derived( Math.round( formats.esm / data.uncompressed * 10000 ) / 100 );
+const cjsPercentage = $derived( Math.round( formats.cjs / data.uncompressed * 10000 ) / 100);
+const unknownPercentage = $derived( Math.round( formats.unknown / data.uncompressed * 10000 ) / 100 );
 
 const dependencies = $derived.by<Array<string>>( () => {
 	const packageNameRegExp = /(?:.*node_modules\/)(@[^\/]+\/[^\/]+|[^\/]+)/;