Health Percentage?

Hey everyone, I was wondering if it was possible to do something like a health percentage? I'm completely new to Unity so this is probably super easy to do. If you don't know what I'm talking about, I made a mock-up image of what I mean.
It Looks a bit like a life system, but not a live system. So yea, I was just wondering how I'd be able to do something like this. Thanks in advanced! ^ -^

 

U can say more details ?

 

What I mean is a Health System that draws how much health you have but with numbers. Let's say I have a HP variable and it is set to 8, the health thing would say "HP: 8" or something.

 

U can use health bar , with HP 100/100

like this demo ?

 

I made a video demonstrating how to do this:

It uses this script, which is attached to a text object:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using UnityEngine.UI;
4.  
5. public class ModifyText : MonoBehaviour {
6.  
7.     int health = 0;
8.  
9.     // Use this for initialization
10.     void Start () {
11.  
12.     }
13.  
14.     // Update is called once per frame
15.     void Update () {
16.         health = (health+1) % 101;
17.         Text text = this.GetComponent<Text>();
18.         text.text = "Health: " + health;
19.     }
20. }