diff --git a/docs/FreeBedsChartView.js b/docs/FreeBedsChartView.js
index e6d3923c431..a0f81418508 100644
--- a/docs/FreeBedsChartView.js
+++ b/docs/FreeBedsChartView.js
@@ -80,17 +80,7 @@ class FreeBedsChartView {
                 },
                 tooltip: {
                     callbacks: {
-                        label: function (context) {
-                            let label = context.dataset.label || '';
-
-                            if (label) {
-                                label += ': ';
-                            }
-                            if (context.parsed.y !== null) {
-                                label += context.parsed.y.toFixed(1) + "%";
-                            }
-                            return label;
-                        }
+                        label: UIUtils.labelWithPercentCallback
                     }
                 }
             },
diff --git a/docs/MedianOfFreeBedsByKreisChartView.js b/docs/MedianOfFreeBedsByKreisChartView.js
index f2e8235d0d6..c0d5dbb89a8 100644
--- a/docs/MedianOfFreeBedsByKreisChartView.js
+++ b/docs/MedianOfFreeBedsByKreisChartView.js
@@ -44,19 +44,8 @@ class MedianOfFreeBedsByKreisChartView {
                     text: 'some Title'
                 },
                 tooltip: {
-                    // FK-TODO: DRY with FreeBedsChartView.js
                     callbacks: {
-                        label: function (context) {
-                            let label = context.dataset.label || '';
-
-                            if (label) {
-                                label += ': ';
-                            }
-                            if (context.parsed.y !== null) {
-                                label += context.parsed.y.toFixed(1) + "%";
-                            }
-                            return label;
-                        }
+                        label: UIUtils.labelWithPercentCallback
                     }
                 }
             },
diff --git a/docs/UIUtils.js b/docs/UIUtils.js
index ca1bb40abf8..3c19414b7c5 100644
--- a/docs/UIUtils.js
+++ b/docs/UIUtils.js
@@ -16,4 +16,16 @@ class UIUtils {
     static getSelectedOption(selectElement) {
         return selectElement.options[selectElement.selectedIndex];
     }
+
+    static labelWithPercentCallback(context) {
+        let label = context.dataset.label || '';
+
+        if (label) {
+            label += ': ';
+        }
+        if (context.parsed.y !== null) {
+            label += context.parsed.y.toFixed(1) + "%";
+        }
+        return label;
+    }
 }