Comment Comment by boole1854 You can hover over places on the chart to get exact values. In January 1980, the index was at 37.124. In April 2025, it was at 125.880.Then calculate cumulative inflation as the proportional change in the price level, like this:(P_final - P_initial) / P_initial = (125.880 - 37.124) / 37.124 = 2.39This shows that the overall price level (the cumulative inflation embodied in the PCEPI) has increased by about 2.39 times over the period, which is 239%. parent boole1854 1 year ago
Then calculate cumulative inflation as the proportional change in the price level, like this:
(P_final - P_initial) / P_initial = (125.880 - 37.124) / 37.124 = 2.39
This shows that the overall price level (the cumulative inflation embodied in the PCEPI) has increased by about 2.39 times over the period, which is 239%.