204.07% is the change from 270 to 821
Calculation steps:
[( 821 - 270 ) ÷ 270] x 100 = 204.07%
Formula
Percentage change = [(821 - 270) / 270] x 100
Subtract the new number by the original number
821 - 270 = 551
551 ÷ 270 = 2.0407407407407407
2.0407407407407407 x 100 = 204.07%