-5.08% is the change from 669 to 635
Calculation steps:
[( 635 - 669 ) ÷ 669] x 100 = -5.08%
Formula
Percentage change = [(635 - 669) / 669] x 100
Subtract the new number by the original number
635 - 669 = -34
-34 ÷ 669 = -0.05082212257100149
-0.05082212257100149 x 100 = -5.08%