-91.16% is the change from 611 to 54
Calculation steps:
[( 54 - 611 ) ÷ 611] x 100 = -91.16%
Formula
Percentage change = [(54 - 611) / 611] x 100
Subtract the new number by the original number
54 - 611 = -557
-557 ÷ 611 = -0.911620294599018
-0.911620294599018 x 100 = -91.16%