-70.4% is the change from 669 to 198
Calculation steps:
[( 198 - 669 ) ÷ 669] x 100 = -70.4%
Formula
Percentage change = [(198 - 669) / 669] x 100
Subtract the new number by the original number
198 - 669 = -471
-471 ÷ 669 = -0.7040358744394619
-0.7040358744394619 x 100 = -70.4%