76.65% is the change from 257 to 454
Calculation steps:
[( 454 - 257 ) ÷ 257] x 100 = 76.65%
Formula
Percentage change = [(454 - 257) / 257] x 100
Subtract the new number by the original number
454 - 257 = 197
197 ÷ 257 = 0.7665369649805448
0.7665369649805448 x 100 = 76.65%