-96.89% is the change from 257 to 8
Calculation steps:
[( 8 - 257 ) ÷ 257] x 100 = -96.89%
Formula
Percentage change = [(8 - 257) / 257] x 100
Subtract the new number by the original number
8 - 257 = -249
-249 ÷ 257 = -0.9688715953307393
-0.9688715953307393 x 100 = -96.89%