257.21% is the change from 229 to 818
Calculation steps:
[( 818 - 229 ) ÷ 229] x 100 = 257.21%
Formula
Percentage change = [(818 - 229) / 229] x 100
Subtract the new number by the original number
818 - 229 = 589
589 ÷ 229 = 2.572052401746725
2.572052401746725 x 100 = 257.21%