216.34% is the change from 257 to 813
Calculation steps:
[( 813 - 257 ) ÷ 257] x 100 = 216.34%
Formula
Percentage change = [(813 - 257) / 257] x 100
Subtract the new number by the original number
813 - 257 = 556
556 ÷ 257 = 2.1634241245136185
2.1634241245136185 x 100 = 216.34%