20275% is the change from 4 to 815
Calculation steps:
[( 815 - 4 ) ÷ 4] x 100 = 20275%
Formula
Percentage change = [(815 - 4) / 4] x 100
Subtract the new number by the original number
815 - 4 = 811
811 ÷ 4 = 202.75
202.75 x 100 = 20275%
Example