-86.12% is the change from 980 to 136
Calculation steps:
[( 136 - 980 ) ÷ 980] x 100 = -86.12%
Formula
Percentage change = [(136 - 980) / 980] x 100
Subtract the new number by the original number
136 - 980 = -844
-844 ÷ 980 = -0.8612244897959184
-0.8612244897959184 x 100 = -86.12%