-86.68% is the change from 961 to 128
Calculation steps:
[( 128 - 961 ) ÷ 961] x 100 = -86.68%
Formula
Percentage change = [(128 - 961) / 961] x 100
Subtract the new number by the original number
128 - 961 = -833
-833 ÷ 961 = -0.8668054110301769
-0.8668054110301769 x 100 = -86.68%