-90.63% is the change from 128 to 12
Calculation steps:
[( 12 - 128 ) ÷ 128] x 100 = -90.63%
Formula
Percentage change = [(12 - 128) / 128] x 100
Subtract the new number by the original number
12 - 128 = -116
-116 ÷ 128 = -0.90625
-0.90625 x 100 = -90.63%