-91.92% is the change from 668 to 54
Calculation steps:
[( 54 - 668 ) ÷ 668] x 100 = -91.92%
Formula
Percentage change = [(54 - 668) / 668] x 100
Subtract the new number by the original number
54 - 668 = -614
-614 ÷ 668 = -0.9191616766467066
-0.9191616766467066 x 100 = -91.92%