-86.65% is the change from 959 to 128
Calculation steps:
[( 128 - 959 ) ÷ 959] x 100 = -86.65%
Formula
Percentage change = [(128 - 959) / 959] x 100
Subtract the new number by the original number
128 - 959 = -831
-831 ÷ 959 = -0.8665276329509907
-0.8665276329509907 x 100 = -86.65%