273.18% is the change from 220 to 821
Calculation steps:
[( 821 - 220 ) ÷ 220] x 100 = 273.18%
Formula
Percentage change = [(821 - 220) / 220] x 100
Subtract the new number by the original number
821 - 220 = 601
601 ÷ 220 = 2.731818181818182
2.731818181818182 x 100 = 273.18%