2005% is the change from 40 to 842
Calculation steps:
[( 842 - 40 ) ÷ 40] x 100 = 2005%
Formula
Percentage change = [(842 - 40) / 40] x 100
Subtract the new number by the original number
842 - 40 = 802
802 ÷ 40 = 20.05
20.05 x 100 = 2005%
Example