diff --git a/lib/rubella/weighting/expotential.rb b/lib/rubella/weighting/expotential.rb
index 5ed3c01..f0c1c08 100644
--- a/lib/rubella/weighting/expotential.rb
+++ b/lib/rubella/weighting/expotential.rb
@@ -25,7 +25,12 @@ module Rubella
           # every 10 load percent one heatpoint
           i = 0
           data_list << Array.new(buckets) do
-            amount    = cores.select { |core| core >= i and core < (i+@steps)}.length
+            current_cores = cores.select do |core|
+              core >= i and
+                ((core < (i+@steps)) or (core <= (i+@steps) and i+@steps == 100))
+            end
+
+            amount = current_cores.length
             i         = i + @steps
             core      = (amount.to_f*bucket_no**0.8)/cores.length
             bucket_no = bucket_no + 1
diff --git a/lib/rubella/weighting/per_overall_load.rb b/lib/rubella/weighting/per_overall_load.rb
index a60687b..b0d5622 100644
--- a/lib/rubella/weighting/per_overall_load.rb
+++ b/lib/rubella/weighting/per_overall_load.rb
@@ -32,7 +32,10 @@ module Rubella
           i = 0
           data_list << Array.new(buckets) do
             # Select all current cores
-            selected_cores = cores.select { |core| core >= i and core < (i+@steps)}
+            selected_cores = cores.select do |core|
+              core >= i and
+                ((core < (i+@steps)) or (core <= (i+@steps) and i+@steps == 100))
+            end
             i = i + @steps
 
             # add the load of the resulting cores and multiply it with the overall value
diff --git a/lib/rubella/weighting/per_value.rb b/lib/rubella/weighting/per_value.rb
index 09b33ae..a100c02 100644
--- a/lib/rubella/weighting/per_value.rb
+++ b/lib/rubella/weighting/per_value.rb
@@ -24,8 +24,12 @@ module Rubella
           # every 10 load percent one heatpoint
           i = 0
           data_list << Array.new(buckets) do
-            amount = cores.select { |core| core >= i and core < (i+@steps)}.length
-            i = i + @steps
+            current_cores = cores.select do |core|
+              core >= i and
+                ((core < (i+@steps)) or (core <= (i+@steps) and i+@steps == 100))
+            end
+            amount = current_cores.length
+            i      = i + @steps
             amount.to_f/cores.length
           end
         end