-54.82% is the change from 166 to 75
Calculation steps:
[( 75 - 166 ) ÷ 166] x 100 = -54.82%
Formula
Percentage change = [(75 - 166) / 166] x 100
Subtract the new number by the original number
75 - 166 = -91
-91 ÷ 166 = -0.5481927710843374
-0.5481927710843374 x 100 = -54.82%