Work percentage calculator

work.py

from sympy import symbols, Eq, solve

def calculate_work_percentage(additional_free_days, total_workdays_per_year=260, current_vacation_days=30):
    """
    Calculate the required percentage of working time to achieve the desired total free days.

    Parameters:
        additional_free_days (float): The total free days you want to add to your vacation.
        total_workdays_per_year (int): The average number of workdays in a year (default: 260).
        current_vacation_days (int): The current number of vacation days (default: 30).

    Returns:
        float: The required working percentage.
    """
    # Define the percentage of working time as a symbol
    x = symbols('x')

    # Equation for total free days
    vacation_days = current_vacation_days * (x / 100)
    gained_free_days = (100 - x) * (total_workdays_per_year / 100)

    # Total free days equation
    total_free_days = current_vacation_days + additional_free_days
    equation = Eq(vacation_days + gained_free_days, total_free_days)

    # Solve for x (percentage of working time)
    required_work_percentage = solve(equation, x)[0]

    return float(required_work_percentage)

if __name__ == "__main__":
    # Input: additional free days desired
    additional_free_days = float(input("Enter the number of additional free days you want: "))

    # Calculate the required working percentage
    result = calculate_work_percentage(additional_free_days)

    print(f"To achieve {30 + additional_free_days} total free days, you need to work approximately {result:.2f}% of full-time.")