85.99% is the change from 257 to 478
Calculation steps:
[( 478 - 257 ) ÷ 257] x 100 = 85.99%
Formula
Percentage change = [(478 - 257) / 257] x 100
Subtract the new number by the original number
478 - 257 = 221
221 ÷ 257 = 0.8599221789883269
0.8599221789883269 x 100 = 85.99%