-86.84% is the change from 980 to 129
Calculation steps:
[( 129 - 980 ) ÷ 980] x 100 = -86.84%
Formula
Percentage change = [(129 - 980) / 980] x 100
Subtract the new number by the original number
129 - 980 = -851
-851 ÷ 980 = -0.8683673469387755
-0.8683673469387755 x 100 = -86.84%