20850% is the change from 4 to 838
Calculation steps:
[( 838 - 4 ) ÷ 4] x 100 = 20850%
Formula
Percentage change = [(838 - 4) / 4] x 100
Subtract the new number by the original number
838 - 4 = 834
834 ÷ 4 = 208.5
208.5 x 100 = 20850%
Example