-99.55% is the change from 669 to 3
Calculation steps:
[( 3 - 669 ) ÷ 669] x 100 = -99.55%
Formula
Percentage change = [(3 - 669) / 669] x 100
Subtract the new number by the original number
3 - 669 = -666
-666 ÷ 669 = -0.9955156950672646
-0.9955156950672646 x 100 = -99.55%