One example (when CPI index 2000 = 100): CPI in 2002 = (325263 / 314712) * 100 = 103.35 Inflation rate = [(CPI in current year - CPI in previous year) / CPI in the previous year one example for 2002=[*103.35-100.34)/100.34]*100=3.00% b)One example (when CPI index 2010 = 100): CPI in 2002 = (325263 / 407,865) * 100 = 79.75 Inflation rate = [(CPI in current year - CPI in previous year) / CPI in the previous year one example for 2002=[(79.75-77.42)/77.42]*100=3.00%