20500% is the change from 4 to 824
Calculation steps:
[( 824 - 4 ) ÷ 4] x 100 = 20500%
Formula
Percentage change = [(824 - 4) / 4] x 100
Subtract the new number by the original number
824 - 4 = 820
820 ÷ 4 = 205
205 x 100 = 20500%
Example