-86.3% is the change from 934 to 128
Calculation steps:
[( 128 - 934 ) ÷ 934] x 100 = -86.3%
Formula
Percentage change = [(128 - 934) / 934] x 100
Subtract the new number by the original number
128 - 934 = -806
-806 ÷ 934 = -0.8629550321199143
-0.8629550321199143 x 100 = -86.3%