-99.08% is the change from 650 to 6
Calculation steps:
[( 6 - 650 ) ÷ 650] x 100 = -99.08%
Formula
Percentage change = [(6 - 650) / 650] x 100
Subtract the new number by the original number
6 - 650 = -644
-644 ÷ 650 = -0.9907692307692307
-0.9907692307692307 x 100 = -99.08%