diff --git a/README.md b/README.md
index e95e4a4..6160dcc 100644
--- a/README.md
+++ b/README.md
@@ -186,6 +186,7 @@ There are predefined keys for these test.
 total-call
 total-succeeded
 total-lost
+success-percent
 average-ttl-ms
 maximum-ttl-ms
 minimum-ttl-ms
diff --git a/src/RA.Tests/MockResponseContextWithJson.cs b/src/RA.Tests/MockResponseContextWithJson.cs
index c00eb8c..905f63a 100644
--- a/src/RA.Tests/MockResponseContextWithJson.cs
+++ b/src/RA.Tests/MockResponseContextWithJson.cs
@@ -184,6 +184,14 @@ public void TestLoadForTotalCall()
                 .Assert("load for total call");
         }
 
+        [Test]
+        public void TestLoadForSuccessPercentageCall()
+        {
+            _responseWithObject
+                .TestLoad("load for success average", "success-percent", x => x > 0 && x <= 1)
+                .Assert("load for success average");
+        }
+
         [Test]
         public void WriteAssertions()
         {
diff --git a/src/RA/Enums/LoadValueTypes.cs b/src/RA/Enums/LoadValueTypes.cs
index 675c705..877d572 100644
--- a/src/RA/Enums/LoadValueTypes.cs
+++ b/src/RA/Enums/LoadValueTypes.cs
@@ -7,6 +7,7 @@ public class LoadValueTypes : Enumeration<LoadValueTypes, string>
         public static LoadValueTypes TotalCall = new LoadValueTypes("Total-Call", "Total Call");
         public static LoadValueTypes TotalSucceeded = new LoadValueTypes("Total-Succeeded", "Total Succeeded");
         public static LoadValueTypes TotalLost = new LoadValueTypes("Total-Lost", "Total Lost");
+        public static LoadValueTypes SuccessPercent = new LoadValueTypes("Success-Percent", "Success Percent");
         public static LoadValueTypes AverageTTLMs = new LoadValueTypes("Average-TTL-Ms", "Average TTL Ms");
         public static LoadValueTypes MaximumTTLMs = new LoadValueTypes("Maximum-TTL-Ms", "Maximum TTL Ms");
         public static LoadValueTypes MinimumTTLMs = new LoadValueTypes("Minimum-TTL-Ms", "Minimum TTL Ms");
diff --git a/src/RA/ResponseContext.cs b/src/RA/ResponseContext.cs
index 183743b..873b15c 100644
--- a/src/RA/ResponseContext.cs
+++ b/src/RA/ResponseContext.cs
@@ -275,6 +275,7 @@ private void ParseLoad()
             if (_loadResponses.Any())
             {
                 _loadValues.Add(LoadValueTypes.TotalCall.Value, _loadResponses.Count);
+                _loadValues.Add(LoadValueTypes.SuccessPercent.Value, _loadResponses.Count(x => x.StatusCode == (int)HttpStatusCode.OK)/_loadResponses.Count);
                 _loadValues.Add(LoadValueTypes.TotalSucceeded.Value, _loadResponses.Count(x => x.StatusCode == (int)HttpStatusCode.OK));
                 _loadValues.Add(LoadValueTypes.TotalLost.Value, _loadResponses.Count(x => x.StatusCode == -1));
                 _loadValues.Add(LoadValueTypes.AverageTTLMs.Value, new TimeSpan((long)_loadResponses.Where(x => x.StatusCode == (int)HttpStatusCode.OK).Average(x => x.Ticks)).TotalMilliseconds);