258.08% is the change from 229 to 820
Calculation steps:
[( 820 - 229 ) ÷ 229] x 100 = 258.08%
Formula
Percentage change = [(820 - 229) / 229] x 100
Subtract the new number by the original number
820 - 229 = 591
591 ÷ 229 = 2.5807860262008733
2.5807860262008733 x 100 = 258.08%