-30.51% is the change from 649 to 451
Calculation steps:
[( 451 - 649 ) ÷ 649] x 100 = -30.51%
Formula
Percentage change = [(451 - 649) / 649] x 100
Subtract the new number by the original number
451 - 649 = -198
-198 ÷ 649 = -0.3050847457627119
-0.3050847457627119 x 100 = -30.51%