Added a new Investment Rules snippet to calculate Real Inflation adjested return

Author: Mallikarjun

INVESTMENT_RULES/README.md

@@ -12,4 +12,17 @@
 ### How the Rule of 72 Works
     For example, the Rule of 72 states that $1 invested at an annual fixed interest rate of 10% would take 7.2 years ((72 ÷ 10) = 7.2) to grow to $2. 
 
-For more details refer https://www.investopedia.com/ask/answers/what-is-the-rule-72/
+For more details refer https://www.investopedia.com/ask/answers/what-is-the-rule-72/
+
+## 2. Real Rate of Return adjusted to Inflation
+    You know that investments have to do more than keep pace with inflation for you to build wealth. As Golden says, 
+    “A dollar today is not worth a dollar in the future.” But how do you determine what your investment return is after inflation?
+    This equation helps you compute your real return, or your return adjusted for inflation. 
+
+    For example, if an investment returns 8 percent, and inflation is 3 percent, this is how you’d set up the problem:
+    [ ( 1.08 ÷ 1.03 ) - 1 ] x 100 = 4.85 percent real return
+    
+    “You’re losing to inflation every year,” says Charles Sachs, a wealth manager at Kaufman Rossin Wealth in Miami.
+    “Long term, inflation runs about 3 percent. So your money buys half as much in 20 years.”
+
+    Learn more here--> https://finance.yahoo.com/news/6-investment-formulas-financial-success-172744221.html

INVESTMENT_RULES/inflation_adjusted_return.py

@@ -0,0 +1,18 @@
+Inflation_Adjsted_Return_Summary = """
+Learn More about this investment rule in README.md located in INVESTMENT_RULES folder** 
+ """
+
+print(Inflation_Adjsted_Return_Summary)
+
+# Get the Avg Investment Rate of Return and Avg Inflation Rate
+invest_rate_return = float(input("What is expected average  Rate of Return (don't use % sign): "))/100
+avg_inflration_rate = float(input("What is your avg inflation rate?: "))/100
+
+
+def inflation_adjusted_return(invest_rate_return, avg_inflration_rate):
+    # Simple formula is : ((1 + Investment return percentage) / (1 + Inflation rate percentage) - 1) x 100
+    inflration_adjusted_return_val = (((1 +invest_rate_return )/(1 +avg_inflration_rate)) - 1) * 100
+    return inflration_adjusted_return_val
+
+real_return = round(inflation_adjusted_return(invest_rate_return, avg_inflration_rate),2)
+print(f"Your Actual Rate of Return adjusted to the inflation is {real_return}%. Not {invest_rate_return*100}% ")