-60.09% is the change from 649 to 259
Calculation steps:
[( 259 - 649 ) ÷ 649] x 100 = -60.09%
Formula
Percentage change = [(259 - 649) / 649] x 100
Subtract the new number by the original number
259 - 649 = -390
-390 ÷ 649 = -0.600924499229584
-0.600924499229584 x 100 = -60.09%