-98.95% is the change from 669 to 7
Calculation steps:
[( 7 - 669 ) ÷ 669] x 100 = -98.95%
Formula
Percentage change = [(7 - 669) / 669] x 100
Subtract the new number by the original number
7 - 669 = -662
-662 ÷ 669 = -0.9895366218236173
-0.9895366218236173 x 100 = -98.95%