-82.03% is the change from 128 to 23
Calculation steps:
[( 23 - 128 ) ÷ 128] x 100 = -82.03%
Formula
Percentage change = [(23 - 128) / 128] x 100
Subtract the new number by the original number
23 - 128 = -105
-105 ÷ 128 = -0.8203125
-0.8203125 x 100 = -82.03%