= "<progress value='" + (length(filter(this.file.tasks.completed, (t) => t = true)) / length(this.file.tasks)) * 100 + "' max='100'></progress>" + "<br>" + round((length(filter(this.file.tasks.completed, (t) => t = true)) / length(this.file.tasks)) * 100) + "% completado"

Progress bars - Minimal Documentation