227.09% is the change from 251 to 821
Calculation steps:
[( 821 - 251 ) ÷ 251] x 100 = 227.09%
Formula
Percentage change = [(821 - 251) / 251] x 100
Subtract the new number by the original number
821 - 251 = 570
570 ÷ 251 = 2.270916334661355
2.270916334661355 x 100 = 227.09%