-97.52% is the change from 161 to 4
Calculation steps:
[( 4 - 161 ) ÷ 161] x 100 = -97.52%
Formula
Percentage change = [(4 - 161) / 161] x 100
Subtract the new number by the original number
4 - 161 = -157
-157 ÷ 161 = -0.9751552795031055
-0.9751552795031055 x 100 = -97.52%