-67.32% is the change from 257 to 84
Calculation steps:
[( 84 - 257 ) ÷ 257] x 100 = -67.32%
Formula
Percentage change = [(84 - 257) / 257] x 100
Subtract the new number by the original number
84 - 257 = -173
-173 ÷ 257 = -0.6731517509727627
-0.6731517509727627 x 100 = -67.32%