-6.88% is the change from 669 to 623
Calculation steps:
[( 623 - 669 ) ÷ 669] x 100 = -6.88%
Formula
Percentage change = [(623 - 669) / 669] x 100
Subtract the new number by the original number
623 - 669 = -46
-46 ÷ 669 = -0.0687593423019432
-0.0687593423019432 x 100 = -6.88%