-1.89% is the change from 635 to 623
Calculation steps:
[( 623 - 635 ) ÷ 635] x 100 = -1.89%
Formula
Percentage change = [(623 - 635) / 635] x 100
Subtract the new number by the original number
623 - 635 = -12
-12 ÷ 635 = -0.01889763779527559
-0.01889763779527559 x 100 = -1.89%