-98.77% is the change from 650 to 8
Calculation steps:
[( 8 - 650 ) ÷ 650] x 100 = -98.77%
Formula
Percentage change = [(8 - 650) / 650] x 100
Subtract the new number by the original number
8 - 650 = -642
-642 ÷ 650 = -0.9876923076923076
-0.9876923076923076 x 100 = -98.77%