400.61% is the change from 164 to 821
Calculation steps:
[( 821 - 164 ) ÷ 164] x 100 = 400.61%
Formula
Percentage change = [(821 - 164) / 164] x 100
Subtract the new number by the original number
821 - 164 = 657
657 ÷ 164 = 4.0060975609756095
4.0060975609756095 x 100 = 400.61%