diff --git a/x-pack/plugin/profiling/src/main/java/org/elasticsearch/xpack/profiling/action/GetTopNFunctionsResponse.java b/x-pack/plugin/profiling/src/main/java/org/elasticsearch/xpack/profiling/action/GetTopNFunctionsResponse.java
index a42e64546058c..4ee496dcb2870 100644
--- a/x-pack/plugin/profiling/src/main/java/org/elasticsearch/xpack/profiling/action/GetTopNFunctionsResponse.java
+++ b/x-pack/plugin/profiling/src/main/java/org/elasticsearch/xpack/profiling/action/GetTopNFunctionsResponse.java
@@ -67,8 +67,8 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
         builder.startObject();
         builder.field("self_count", selfCount);
         builder.field("total_count", totalCount);
-        builder.field("self_annual_co2_tons", annualCo2Tons);
-        builder.field("self_annual_cost_usd", annualCostsUsd);
+        builder.field("self_annual_co2_tons").rawValue(NumberUtils.doubleToString(annualCo2Tons));
+        builder.field("self_annual_cost_usd").rawValue(NumberUtils.doubleToString(annualCostsUsd));
         builder.xContentList("topn", topNFunctions);
         builder.endObject();
         return builder;
diff --git a/x-pack/plugin/profiling/src/test/java/org/elasticsearch/xpack/profiling/action/GetTopNFunctionsResponseTests.java b/x-pack/plugin/profiling/src/test/java/org/elasticsearch/xpack/profiling/action/GetTopNFunctionsResponseTests.java
new file mode 100644
index 0000000000000..ebb3d492b024c
--- /dev/null
+++ b/x-pack/plugin/profiling/src/test/java/org/elasticsearch/xpack/profiling/action/GetTopNFunctionsResponseTests.java
@@ -0,0 +1,95 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+package org.elasticsearch.xpack.profiling.action;
+
+import org.elasticsearch.common.bytes.BytesReference;
+import org.elasticsearch.test.ESTestCase;
+import org.elasticsearch.xcontent.ToXContent;
+import org.elasticsearch.xcontent.XContentBuilder;
+import org.elasticsearch.xcontent.XContentFactory;
+import org.elasticsearch.xcontent.XContentType;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+
+import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertToXContentEquivalent;
+
+public class GetTopNFunctionsResponseTests extends ESTestCase {
+
+    public void testToXContent() throws IOException {
+        String fileID = "6tVKI4mSYDEJ-ABAIpYXcg";
+        int frameType = 1;
+        boolean inline = false;
+        int addressOrLine = 23;
+        String functionName = "PyDict_GetItemWithError";
+        String sourceFilename = "/build/python3.9-RNBry6/python3.9-3.9.2/Objects/dictobject.c";
+        int sourceLine = 1456;
+        String exeFilename = "python3.9";
+
+        String frameGroupID = FrameGroupID.create(fileID, addressOrLine, exeFilename, sourceFilename, functionName);
+
+        XContentType contentType = randomFrom(XContentType.values());
+
+        // tag::noformat
+        XContentBuilder expectedResponse = XContentFactory.contentBuilder(contentType)
+            .startObject()
+                .field("self_count", 1)
+                .field("total_count", 10)
+                .field("self_annual_co2_tons").rawValue("2.2000")
+                .field("self_annual_cost_usd").rawValue("12.0000")
+                .startArray("topn")
+                    .startObject()
+                        .field("id", frameGroupID)
+                        .field("rank", 1)
+                        .startObject("frame")
+                            .field("frame_type", frameType)
+                            .field("inline", inline)
+                            .field("address_or_line", addressOrLine)
+                            .field("function_name", functionName)
+                            .field("file_name", sourceFilename)
+                            .field("line_number", sourceLine)
+                            .field("executable_file_name", exeFilename)
+                        .endObject()
+                        .field("sub_groups", Map.of("basket", 7L))
+                        .field("self_count", 1)
+                        .field("total_count", 10)
+                        .field("self_annual_co2_tons").rawValue("2.2000")
+                        .field("total_annual_co2_tons").rawValue("22.0000")
+                        .field("self_annual_costs_usd").rawValue("12.0000")
+                        .field("total_annual_costs_usd").rawValue("120.0000")
+                    .endObject()
+                .endArray()
+            .endObject();
+        // end::noformat
+
+        XContentBuilder actualResponse = XContentFactory.contentBuilder(contentType);
+        TopNFunction topNFunction = new TopNFunction(
+            frameGroupID,
+            1,
+            frameType,
+            inline,
+            addressOrLine,
+            functionName,
+            sourceFilename,
+            sourceLine,
+            exeFilename,
+            1,
+            10,
+            2.2d,
+            22.0d,
+            12.0d,
+            120.0d,
+            Map.of("basket", 7L)
+        );
+        GetTopNFunctionsResponse response = new GetTopNFunctionsResponse(1, 10, 2.2d, 12.0d, List.of(topNFunction));
+        response.toXContent(actualResponse, ToXContent.EMPTY_PARAMS);
+
+        assertToXContentEquivalent(BytesReference.bytes(expectedResponse), BytesReference.bytes(actualResponse), contentType);
+    }
+}