-80.31% is the change from 650 to 128
Calculation steps:
[( 128 - 650 ) ÷ 650] x 100 = -80.31%
Formula
Percentage change = [(128 - 650) / 650] x 100
Subtract the new number by the original number
128 - 650 = -522
-522 ÷ 650 = -0.803076923076923
-0.803076923076923 x 100 = -80.31%