-8.97% is the change from 669 to 609
Calculation steps:
[( 609 - 669 ) ÷ 669] x 100 = -8.97%
Formula
Percentage change = [(609 - 669) / 669] x 100
Subtract the new number by the original number
609 - 669 = -60
-60 ÷ 669 = -0.08968609865470852
-0.08968609865470852 x 100 = -8.97%