17.89% is the change from 218 to 257
Calculation steps:
[( 257 - 218 ) ÷ 218] x 100 = 17.89%
Formula
Percentage change = [(257 - 218) / 218] x 100
Subtract the new number by the original number
257 - 218 = 39
39 ÷ 218 = 0.17889908256880735
0.17889908256880735 x 100 = 17.89%