-84.82% is the change from 257 to 39
Calculation steps:
[( 39 - 257 ) ÷ 257] x 100 = -84.82%
Formula
Percentage change = [(39 - 257) / 257] x 100
Subtract the new number by the original number
39 - 257 = -218
-218 ÷ 257 = -0.8482490272373541
-0.8482490272373541 x 100 = -84.82%