28. Suppose the CPI in 2017 = 121 and the CPI in 2018 = 137. The correct method to calculate the inflation rate is (A)(137-121)/100 = 0.16. (B)[(137-121)/121] × 100 = 13.2. (C) (137/121) × 100 = 113.2. (D) 137 x 121 = 258.