2020% is the change from 40 to 848
Calculation steps:
[( 848 - 40 ) ÷ 40] x 100 = 2020%
Formula
Percentage change = [(848 - 40) / 40] x 100
Subtract the new number by the original number
848 - 40 = 808
808 ÷ 40 = 20.2
20.2 x 100 = 2020%
Example