16.82% is the change from 220 to 257
Calculation steps:
[( 257 - 220 ) ÷ 220] x 100 = 16.82%
Formula
Percentage change = [(257 - 220) / 220] x 100
Subtract the new number by the original number
257 - 220 = 37
37 ÷ 220 = 0.16818181818181818
0.16818181818181818 x 100 = 16.82%