diff --git a/monasca_transform/component/usage/fetch_quantity_util.py b/monasca_transform/component/usage/fetch_quantity_util.py
index 55c0569..624eb9d 100644
--- a/monasca_transform/component/usage/fetch_quantity_util.py
+++ b/monasca_transform/component/usage/fetch_quantity_util.py
@@ -12,7 +12,6 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from pyspark.sql.functions import ceil
 from pyspark.sql.functions import col
 from pyspark.sql.functions import when
 from pyspark.sql import SQLContext
@@ -157,7 +156,7 @@ class FetchQuantityUtil(UsageComponent):
         To calculate the utilized quantity  this component uses following
         formula:
 
-        utilized quantity = ceil((100 - idle_perc) * total_quantity / 100)
+        utilized quantity = (100 - idle_perc) * total_quantity / 100
 
         """
 
@@ -252,9 +251,9 @@ class FetchQuantityUtil(UsageComponent):
         quant_idle_perc_calc_df = quant_idle_perc_df.select(
             col("quantity_df_alias.*"),
             when(col("idle_perc_df_alias.quantity") != 0.0,
-                 ceil(((100.0 - col(
-                     "idle_perc_df_alias.quantity"))) * col(
-                     "quantity_df_alias.quantity") / 100.0))
+                 (100.0 - col(
+                     "idle_perc_df_alias.quantity")) * col(
+                     "quantity_df_alias.quantity") / 100.0)
             .otherwise(col("quantity_df_alias.quantity"))
             .alias("utilized_quantity"),
 
diff --git a/tests/unit/driver/first_attempt_at_spark_test.py b/tests/unit/driver/first_attempt_at_spark_test.py
index a865455..9a59673 100644
--- a/tests/unit/driver/first_attempt_at_spark_test.py
+++ b/tests/unit/driver/first_attempt_at_spark_test.py
@@ -747,7 +747,7 @@ class SparkTest(SparkContextTest):
 
         self.assertTrue(cpu_util_cores_agg_metric is not None)
 
-        self.assertEqual(2.0,
+        self.assertEqual(0.5303809523809525,
                          cpu_util_cores_agg_metric
                          .get('metric').get('value'))
         self.assertEqual('useast',
@@ -789,7 +789,7 @@ class SparkTest(SparkContextTest):
 
         self.assertTrue(cpu_util_cores_agg_metric is not None)
 
-        self.assertEqual(1.0,
+        self.assertEqual(0.3866666666666669,
                          cpu_util_cores_agg_metric
                          .get('metric').get('value'))
         self.assertEqual('useast',
@@ -831,7 +831,7 @@ class SparkTest(SparkContextTest):
 
         self.assertTrue(cpu_util_cores_agg_metric is not None)
 
-        self.assertEqual(1.0,
+        self.assertEqual(0.14371428571428566,
                          cpu_util_cores_agg_metric
                          .get('metric').get('value'))
         self.assertEqual('useast',
diff --git a/tests/unit/usage/test_fetch_quantity_util_agg.py b/tests/unit/usage/test_fetch_quantity_util_agg.py
index a79277f..26d182c 100644
--- a/tests/unit/usage/test_fetch_quantity_util_agg.py
+++ b/tests/unit/usage/test_fetch_quantity_util_agg.py
@@ -181,7 +181,7 @@ class TestFetchQuantityUtilAgg(SparkContextTest):
             if value.get('metric').get(
                 'name') == 'cpu.utilized_logical_cores_agg'][0]
 
-        self.assertEqual(9.0,
+        self.assertEqual(7.7700000000000005,
                          utilized_cpu_logical_agg_metric.get(
                              'metric').get('value'))
         self.assertEqual('useast',
@@ -284,7 +284,7 @@ class TestFetchQuantityUtilAgg(SparkContextTest):
             if value.get('metric').get(
                 'name') == 'cpu.utilized_logical_cores_agg'][0]
 
-        self.assertEqual(11.0,
+        self.assertEqual(9.52,
                          utilized_cpu_logical_agg_metric.get(
                              'metric').get('value'))
         self.assertEqual('useast',
@@ -387,7 +387,7 @@ class TestFetchQuantityUtilAgg(SparkContextTest):
             if value.get('metric').get(
                 'name') == 'cpu.utilized_logical_cores_agg'][0]
 
-        self.assertEqual(8.0,
+        self.assertEqual(7.134214285714285,
                          utilized_cpu_logical_agg_metric.get(
                              'metric').get('value'))
         self.assertEqual('useast',
diff --git a/tests/unit/usage/test_host_cpu_usage_component.py b/tests/unit/usage/test_host_cpu_usage_component.py
index b555240..d704130 100644
--- a/tests/unit/usage/test_host_cpu_usage_component.py
+++ b/tests/unit/usage/test_host_cpu_usage_component.py
@@ -217,7 +217,7 @@ class SparkTest(SparkContextTest):
             value.get('metric').get('dimensions').get('host') ==
             'all'][0]
 
-        self.assertEqual(8.0,
+        self.assertEqual(7.134214285714285,
                          utilized_cpu_logical_agg_metric.get(
                              'metric').get('value'))
         self.assertEqual('useast',
@@ -258,7 +258,7 @@ class SparkTest(SparkContextTest):
             value.get('metric').get('dimensions').get('host') ==
             'test-cp1-comp0333-mgmt'][0]
 
-        self.assertEqual(5.0,
+        self.assertEqual(4.9665,
                          utilized_cpu_logical_agg_metric.get(
                              'metric').get('value'))
         self.assertEqual('useast',
@@ -299,7 +299,7 @@ class SparkTest(SparkContextTest):
             value.get('metric').get('dimensions').get('host') ==
             'test-cp1-comp0027-mgmt'][0]
 
-        self.assertEqual(3.0,
+        self.assertEqual(2.1677142857142853,
                          utilized_cpu_logical_agg_metric.get(
                              'metric').get('value'))
         self.assertEqual('useast',