-50.6% is the change from 168 to 83
Calculation steps:
[( 83 - 168 ) ÷ 168] x 100 = -50.6%
Formula
Percentage change = [(83 - 168) / 168] x 100
Subtract the new number by the original number
83 - 168 = -85
-85 ÷ 168 = -0.5059523809523809
-0.5059523809523809 x 100 = -50.6%