-3.85% is the change from 649 to 624
Calculation steps:
[( 624 - 649 ) ÷ 649] x 100 = -3.85%
Formula
Percentage change = [(624 - 649) / 649] x 100
Subtract the new number by the original number
624 - 649 = -25
-25 ÷ 649 = -0.03852080123266564
-0.03852080123266564 x 100 = -3.85%