256.58% is the change from 228 to 813
Calculation steps:
[( 813 - 228 ) ÷ 228] x 100 = 256.58%
Formula
Percentage change = [(813 - 228) / 228] x 100
Subtract the new number by the original number
813 - 228 = 585
585 ÷ 228 = 2.5657894736842106
2.5657894736842106 x 100 = 256.58%