-91.88% is the change from 665 to 54
Calculation steps:
[( 54 - 665 ) ÷ 665] x 100 = -91.88%
Formula
Percentage change = [(54 - 665) / 665] x 100
Subtract the new number by the original number
54 - 665 = -611
-611 ÷ 665 = -0.9187969924812031
-0.9187969924812031 x 100 = -91.88%