-16.73% is the change from 257 to 214
Calculation steps:
[( 214 - 257 ) ÷ 257] x 100 = -16.73%
Formula
Percentage change = [(214 - 257) / 257] x 100
Subtract the new number by the original number
214 - 257 = -43
-43 ÷ 257 = -0.16731517509727625
-0.16731517509727625 x 100 = -16.73%