82.88% is the change from 257 to 470
Calculation steps:
[( 470 - 257 ) ÷ 257] x 100 = 82.88%
Formula
Percentage change = [(470 - 257) / 257] x 100
Subtract the new number by the original number
470 - 257 = 213
213 ÷ 257 = 0.8287937743190662
0.8287937743190662 x 100 = 82.88%