-83.69% is the change from 331 to 54
Calculation steps:
[( 54 - 331 ) ÷ 331] x 100 = -83.69%
Formula
Percentage change = [(54 - 331) / 331] x 100
Subtract the new number by the original number
54 - 331 = -277
-277 ÷ 331 = -0.8368580060422961
-0.8368580060422961 x 100 = -83.69%