256.96% is the change from 230 to 821
Calculation steps:
[( 821 - 230 ) ÷ 230] x 100 = 256.96%
Formula
Percentage change = [(821 - 230) / 230] x 100
Subtract the new number by the original number
821 - 230 = 591
591 ÷ 230 = 2.5695652173913044
2.5695652173913044 x 100 = 256.96%