diff --git a/docs/intensivstationen.html b/docs/intensivstationen.html
index def195e81df..4a12795eabb 100644
--- a/docs/intensivstationen.html
+++ b/docs/intensivstationen.html
@@ -36,14 +36,11 @@
           kreisText: selectedOption.text,
           kreisValue: selectedOption.value
         });
-      // FK-TODO: extract method
-      fetch(`data/intensivstationen/intensivstationen-${selectedOption.value}.json`)
-        .then(response => response.json())
-        .then(json => {
-          for (const dataElement of json.data) {
-            dataElement.free_beds_divided_by_all_beds_in_percent = dataElement.betten_frei / (dataElement.betten_frei + dataElement.betten_belegt) * 100;
-          }
-          freeBedsChartView.displayChart({ data: json.data, title: selectedOption.text });
+      displayFreeBedsChart(
+        {
+          freeBedsChartView: freeBedsChartView,
+          kreisText: selectedOption.text,
+          kreisValue: selectedOption.value
         });
     }
   </script>
diff --git a/docs/intensivstationen.js b/docs/intensivstationen.js
index 4f50b3cc2d7..1cc0aece53a 100644
--- a/docs/intensivstationen.js
+++ b/docs/intensivstationen.js
@@ -9,3 +9,24 @@ function displayIntensiveCareCapacitiesChart(
             intensiveCareCapacitiesChartView.displayChart({ data: json.data, title: kreisText });
         });
 }
+
+function displayFreeBedsChart({ freeBedsChartView, kreisText, kreisValue }) {
+    fetch(`data/intensivstationen/intensivstationen-${kreisValue}.json`)
+        .then(response => response.json())
+        .then(json =>
+            freeBedsChartView.displayChart(
+                {
+                    data: get_free_beds_divided_by_all_beds_in_percent(json.data),
+                    title: kreisText
+                }));
+}
+
+function get_free_beds_divided_by_all_beds_in_percent(data) {
+    return data.map(({ date, betten_frei, betten_belegt }) =>
+    (
+        {
+            "date": date,
+            "free_beds_divided_by_all_beds_in_percent": betten_frei / (betten_frei + betten_belegt) * 100
+        }
+    ));
+}