-83.02% is the change from 318 to 54
Calculation steps:
[( 54 - 318 ) ÷ 318] x 100 = -83.02%
Formula
Percentage change = [(54 - 318) / 318] x 100
Subtract the new number by the original number
54 - 318 = -264
-264 ÷ 318 = -0.8301886792452831
-0.8301886792452831 x 100 = -83.02%