Can someone help me solving these problems and differentiate between exact interest rate and approximate interest rate in finance economics? I would really apprecite it.? What is the formula ? Please don't give me a vague answer. Suppose I have to calculate Inflation interest rate by using exact interest rate formula , and approximate interest rate. I am given 4 percent real interest and 8 percent nominal rate. How would I calculate Inflation interest rate by using exact interest rate formula and approximate interest rate formula?

3. sing the exact and approximate formulae, what is the inflation rate when a. the real interest rate is 4 percent and the nominal interest rate is 8 percent? b. the real interest rate is 4 percent and the nominal interest rate is 4 percent? c. the real interest rate is -1 percent and the nominal interest rate is 8 percent? d. the real interest rate is 4 percent and the nominal interest rate is 40 percen