-1.73% is the change from 635 to 624
Calculation steps:
[( 624 - 635 ) ÷ 635] x 100 = -1.73%
Formula
Percentage change = [(624 - 635) / 635] x 100
Subtract the new number by the original number
624 - 635 = -11
-11 ÷ 635 = -0.01732283464566929
-0.01732283464566929 x 100 = -1.73%