-86.83% is the change from 972 to 128
Calculation steps:
[( 128 - 972 ) ÷ 972] x 100 = -86.83%
Formula
Percentage change = [(128 - 972) / 972] x 100
Subtract the new number by the original number
128 - 972 = -844
-844 ÷ 972 = -0.8683127572016461
-0.8683127572016461 x 100 = -86.83%