2095% is the change from 40 to 878
Calculation steps:
[( 878 - 40 ) ÷ 40] x 100 = 2095%
Formula
Percentage change = [(878 - 40) / 40] x 100
Subtract the new number by the original number
878 - 40 = 838
838 ÷ 40 = 20.95
20.95 x 100 = 2095%
Example