## Python example program to find the change in percentage between two numbers :

In this post, I will show you how we can find the *change in percentage* between two numbers in *python*. This is a beginner friendly *python* program and you will get the idea of how we can *take user inputs* and how to *calculate* the difference in percentage.

### Steps we will use in the program :

Following steps we will use in this program:

- Ask the user to enter the first number
- Ask the user to enter the second number
- The
*second number*should be greater than the*first number*. Because, we are finding the percent increase of the*second number*as compared to the*first number*. If this condition is*false*, enter one message that the numbers are*invalid*. - Calculate the
*percentage difference*between the two numbers. - Print out the result

### Python program :

Letâ€™s write down the python program :

```
first_number = int(input("Enter your first number :"))
second_number = int(input("Enter your second number :"))
if second_number < first_number:
print("Please enter a valid number")
else:
percent_diff = ((second_number - first_number)/first_number) * 100
print("Difference in percentage is : {}%".format(percent_diff))
```

### Explanation :

In this program :

*first_number*is the first number that we are taking as input from the user.*second_number*is the second number.*input()*method is used to take input in console. We are converting the input to*int*using*int(input())*.- The percent difference is calculated and stored in
*percent_diff*variable. - Finally, we are printing the calculated value i.e.
*percent_diff*

### Sample output :

```
Enter your first number :10
Enter your second number :20
Difference in percentage is : 100.0%
Enter your first number :100
Enter your second number :1000
Difference in percentage is : 900.0%
```