-81.49% is the change from 308 to 57
Calculation steps:
[( 57 - 308 ) ÷ 308] x 100 = -81.49%
Formula
Percentage change = [(57 - 308) / 308] x 100
Subtract the new number by the original number
57 - 308 = -251
-251 ÷ 308 = -0.814935064935065
-0.814935064935065 x 100 = -81.49%