96.11% is the change from 257 to 504
Calculation steps:
[( 504 - 257 ) ÷ 257] x 100 = 96.11%
Formula
Percentage change = [(504 - 257) / 257] x 100
Subtract the new number by the original number
504 - 257 = 247
247 ÷ 257 = 0.9610894941634242
0.9610894941634242 x 100 = 96.11%