-77.34% is the change from 128 to 29
Calculation steps:
[( 29 - 128 ) ÷ 128] x 100 = -77.34%
Formula
Percentage change = [(29 - 128) / 128] x 100
Subtract the new number by the original number
29 - 128 = -99
-99 ÷ 128 = -0.7734375
-0.7734375 x 100 = -77.34%