Calculate each multiplier and intermediate from source.csv: A 100→80→96, B 250→225→247.5, C 80→100→80. Percentage calculator checks one pair: Value A is compared with Base value B as denominator. A net uses 96/100: share 96.00%, change -4.00%. Recovery from final uses 100/96 for 4.17%; recovery after the first fall uses 100/80 for 25.00%. Group 423.5/430 displays -1.51%; do not average row rates. Reversing to 100/96 gives a valid 4.17% recovery answer, not net change; recover 96/100. The panel displays two decimals and does not import CSV or export the complete table. Retain higher-precision calculations. All bases are positive and nonzero.
