-85.1% is the change from 859 to 128
Calculation steps:
[( 128 - 859 ) ÷ 859] x 100 = -85.1%
Formula
Percentage change = [(128 - 859) / 859] x 100
Subtract the new number by the original number
128 - 859 = -731
-731 ÷ 859 = -0.8509895227008148
-0.8509895227008148 x 100 = -85.1%