-35.16% is the change from 128 to 83
Calculation steps:
[( 83 - 128 ) ÷ 128] x 100 = -35.16%
Formula
Percentage change = [(83 - 128) / 128] x 100
Subtract the new number by the original number
83 - 128 = -45
-45 ÷ 128 = -0.3515625
-0.3515625 x 100 = -35.16%