A savings account earns interest once a year, and the interest itself earns interest in later years. Write final_balance(principal, rate_percent, years) returning the balance after years full years, rounded to 2 decimal places.
For example, at 5% per year, 1000 becomes 1050 after one year and 1102.5 after two.
Examples
Input: principal = 1000, rate_percent = 5, years = 2
Output: 1102.5
Input: principal = 250, rate_percent = 0, years = 10
Output: 250.0
Constraints
0 <= principal <= 10**9,0 <= rate_percent <= 100,0 <= years <= 100
Goals
- Turn a percentage into a growth multiplier
- Use the ** operator for repeated yearly growth
- Round money to two decimals