-86.93% is the change from 979 to 128
Calculation steps:
[( 128 - 979 ) ÷ 979] x 100 = -86.93%
Formula
Percentage change = [(128 - 979) / 979] x 100
Subtract the new number by the original number
128 - 979 = -851
-851 ÷ 979 = -0.8692543411644535
-0.8692543411644535 x 100 = -86.93%