-78.99% is the change from 257 to 54
Calculation steps:
[( 54 - 257 ) ÷ 257] x 100 = -78.99%
Formula
Percentage change = [(54 - 257) / 257] x 100
Subtract the new number by the original number
54 - 257 = -203
-203 ÷ 257 = -0.7898832684824902
-0.7898832684824902 x 100 = -78.99%