diff --git a/src/field-list/type-list-item.js b/src/field-list/type-list-item.js
index b03c3a487bf..9e810405e14 100644
--- a/src/field-list/type-list-item.js
+++ b/src/field-list/type-list-item.js
@@ -38,7 +38,8 @@ module.exports = View.extend(tooltipMixin, {
     probability_percentage: {
       deps: ['model.probability'],
       fn: function() {
-        return numeral(this.model.probability).format('0.00%');
+        // no rounding, use exact proportions for relative widths
+        return this.model.probability * 100 + '%';
       }
     },
     tooltip_message: {