-45.83% is the change from 168 to 91
Calculation steps:
[( 91 - 168 ) ÷ 168] x 100 = -45.83%
Formula
Percentage change = [(91 - 168) / 168] x 100
Subtract the new number by the original number
91 - 168 = -77
-77 ÷ 168 = -0.4583333333333333
-0.4583333333333333 x 100 = -45.83%