-9.58% is the change from 689 to 623
Calculation steps:
[( 623 - 689 ) ÷ 689] x 100 = -9.58%
Formula
Percentage change = [(623 - 689) / 689] x 100
Subtract the new number by the original number
623 - 689 = -66
-66 ÷ 689 = -0.09579100145137881
-0.09579100145137881 x 100 = -9.58%
Example