-99.39% is the change from 163 to 1
Calculation steps:
[( 1 - 163 ) ÷ 163] x 100 = -99.39%
Formula
Percentage change = [(1 - 163) / 163] x 100
Subtract the new number by the original number
1 - 163 = -162
-162 ÷ 163 = -0.9938650306748467
-0.9938650306748467 x 100 = -99.39%