-86.09% is the change from 920 to 128
Calculation steps:
[( 128 - 920 ) ÷ 920] x 100 = -86.09%
Formula
Percentage change = [(128 - 920) / 920] x 100
Subtract the new number by the original number
128 - 920 = -792
-792 ÷ 920 = -0.8608695652173913
-0.8608695652173913 x 100 = -86.09%