577.69% is the change from 121 to 820
Calculation steps:
[( 820 - 121 ) ÷ 121] x 100 = 577.69%
Formula
Percentage change = [(820 - 121) / 121] x 100
Subtract the new number by the original number
820 - 121 = 699
699 ÷ 121 = 5.776859504132231
5.776859504132231 x 100 = 577.69%