54.82% is the change from 166 to 257
Calculation steps:
[( 257 - 166 ) ÷ 166] x 100 = 54.82%
Formula
Percentage change = [(257 - 166) / 166] x 100
Subtract the new number by the original number
257 - 166 = 91
91 ÷ 166 = 0.5481927710843374
0.5481927710843374 x 100 = 54.82%