85.6% is the change from 257 to 477
Calculation steps:
[( 477 - 257 ) ÷ 257] x 100 = 85.6%
Formula
Percentage change = [(477 - 257) / 257] x 100
Subtract the new number by the original number
477 - 257 = 220
220 ÷ 257 = 0.8560311284046692
0.8560311284046692 x 100 = 85.6%