diff --git a/executor.go b/executor.go
index 142033a29..15d6fb571 100644
--- a/executor.go
+++ b/executor.go
@@ -1298,6 +1298,7 @@ func (e *executor) executePercentile(ctx context.Context, qcx *Qcx, index string
 		// compute average without integer overflow, then correct for division of
 		// odd numbers by 2
 		possibleNthVal := ((max / 2) + (min / 2)) + (((max % 2) + (min % 2)) / 2)
+		// possibleNthVal = (max + min) / 2
 		// get left count
 		rangeCall.Args[fieldName] = &pql.Condition{
 			Op:    pql.Token(pql.LT),
diff --git a/executor_test.go b/executor_test.go
index 2b37c36b2..9427914b2 100644
--- a/executor_test.go
+++ b/executor_test.go
@@ -6939,7 +6939,7 @@ func variousQueriesOnPercentiles(t *testing.T, c *test.Cluster) {
 		possibleNthVal := int64(0)
 		// bin search
 		for min < max {
-			possibleNthVal = (max + min) / 2
+			possibleNthVal = ((max / 2) + (min / 2)) + (((max % 2) + (min % 2)) / 2)
 			leftCount, rightCount := int64(0), int64(0)
 			for _, num := range nums {
 				if num < possibleNthVal {