diff --git a/webapp/views/wpt-results.js b/webapp/views/wpt-results.js
index 2bc663f489..4cf1ca3e70 100644
--- a/webapp/views/wpt-results.js
+++ b/webapp/views/wpt-results.js
@@ -1176,7 +1176,7 @@ class WPTResults extends AmendMetadataMixin(Pluralizer(WPTColors(WPTFlags(PathIn
       return `${this.getTestNumbersDisplay(passes, total, isDir)} subtests`;
     }
 
-    const formatPercent = parseFloat((passes / total * 100).toFixed(0));
+    const formatPercent = parseFloat((passes / total * 100).toFixed(1));
     let cellDisplay = '';
     // Show flat 0% or 100% only if none or all tests/subtests pass.
     if (passes === 0) {