2002.5% is the change from 40 to 841
Calculation steps:
[( 841 - 40 ) ÷ 40] x 100 = 2002.5%
Formula
Percentage change = [(841 - 40) / 40] x 100
Subtract the new number by the original number
841 - 40 = 801
801 ÷ 40 = 20.025
20.025 x 100 = 2002.5%
Example