-18.68% is the change from 257 to 209
Calculation steps:
[( 209 - 257 ) ÷ 257] x 100 = -18.68%
Formula
Percentage change = [(209 - 257) / 257] x 100
Subtract the new number by the original number
209 - 257 = -48
-48 ÷ 257 = -0.1867704280155642
-0.1867704280155642 x 100 = -18.68%