-86.94% is the change from 980 to 128
Calculation steps:
[( 128 - 980 ) ÷ 980] x 100 = -86.94%
Formula
Percentage change = [(128 - 980) / 980] x 100
Subtract the new number by the original number
128 - 980 = -852
-852 ÷ 980 = -0.8693877551020408
-0.8693877551020408 x 100 = -86.94%