So I've only been using Smartsheet for about a week, I've used excel in the past but am not too knowledgeable about formulas. What I want is to create a formula where the children tasks have a different, hidden percentage to influence the parent task completion %. For example, if I had a task to install power circuits as a parent task and the 3 children tasks are: 1) Obtain quote for power install 2) Approve PO for quote and 3) Install power. Now, if I were to mark off the first 2, you would naturally get about 33.3% of the whole task complete if those two children tasks are 100 % done . But in reality, its much easier and is much faster to complete the first 2 tasks than the last . The first 2 tasks can take 1 week, and the last task can take several months. So is there a way to place a value of the first 2 tasks more at let's say 10% done and the last at 90% ? So that way we can reflect 100% complete for the first two tasks but the overall completion is more like 20%. I realize I can change it manually but of course a formula would be much better :)