2796.55% is the change from 29 to 840
Calculation steps:
[( 840 - 29 ) ÷ 29] x 100 = 2796.55%
Formula
Percentage change = [(840 - 29) / 29] x 100
Subtract the new number by the original number
840 - 29 = 811
811 ÷ 29 = 27.96551724137931
27.96551724137931 x 100 = 2796.55%