diff --git a/app/models/concerns/watchable.rb b/app/models/concerns/watchable.rb
index dc2b67f67..31093cad1 100644
--- a/app/models/concerns/watchable.rb
+++ b/app/models/concerns/watchable.rb
@@ -31,6 +31,26 @@ module Watchable
     following.size
   end
 
+  def simple_contribution_perc(project, perc=nil)
+    @project = project
+    @user = self
+
+    def cal_perc(count_user, count_all)
+      (count_user * 1.0 / (count_all + 0.000000001)).round(5)
+    end
+
+    if (@project['use_blockchain'] == true or @project['use_blockchain'] == 1) && @user.id.present?
+      balance_user = Blockchain::BalanceQueryOneProject.call({"user_id": @user.id, "project_id": @project.id})
+      balance_all = Blockchain::RepoBasicInfo.call({"project_id": @project.id})["cur_supply"]
+      score = cal_perc(balance_user, balance_all)
+      score = (score * 100).round(1).to_s + "%"
+    else
+      score = perc
+    end
+
+    score
+  end
+
   def contribution_perc(project)
     @project = project
     @user = self
diff --git a/app/views/repositories/_contributor.json.jbuilder b/app/views/repositories/_contributor.json.jbuilder
index bd1a037f7..41edbf4af 100644
--- a/app/views/repositories/_contributor.json.jbuilder
+++ b/app/views/repositories/_contributor.json.jbuilder
@@ -6,6 +6,7 @@ if user.blank?
   json.type nil
   json.name contributor["login"]
   json.image_url User::Avatar.get_letter_avatar_url(contributor["login"])
+  json.contribution_perc User.new(login: contributor["login"], mail: contributor["email"]).simple_contribution_perc(project, contributor["contribution_perc"])
 else
   json.contributions contributor["contributions"]
   # json.gid contributor["id"]
@@ -14,5 +15,5 @@ else
   json.name user["name"]
   json.image_url user["avatar_url"]
   db_user = User.find_by_id(user["id"])
-  json.contribution_perc db_user.contribution_perc(project) if db_user.present?
+  json.contribution_perc db_user.simple_contribution_perc(project) if db_user.present?
 end