-82.47% is the change from 308 to 54
Calculation steps:
[( 54 - 308 ) ÷ 308] x 100 = -82.47%
Formula
Percentage change = [(54 - 308) / 308] x 100
Subtract the new number by the original number
54 - 308 = -254
-254 ÷ 308 = -0.8246753246753247
-0.8246753246753247 x 100 = -82.47%