-88.41% is the change from 164 to 19
Calculation steps:
[( 19 - 164 ) ÷ 164] x 100 = -88.41%
Formula
Percentage change = [(19 - 164) / 164] x 100
Subtract the new number by the original number
19 - 164 = -145
-145 ÷ 164 = -0.8841463414634146
-0.8841463414634146 x 100 = -88.41%