-73.44% is the change from 128 to 34
Calculation steps:
[( 34 - 128 ) ÷ 128] x 100 = -73.44%
Formula
Percentage change = [(34 - 128) / 128] x 100
Subtract the new number by the original number
34 - 128 = -94
-94 ÷ 128 = -0.734375
-0.734375 x 100 = -73.44%