2030% is the change from 40 to 852
Calculation steps:
[( 852 - 40 ) ÷ 40] x 100 = 2030%
Formula
Percentage change = [(852 - 40) / 40] x 100
Subtract the new number by the original number
852 - 40 = 812
812 ÷ 40 = 20.3
20.3 x 100 = 2030%
Example