-84.28% is the change from 649 to 102
Calculation steps:
[( 102 - 649 ) ÷ 649] x 100 = -84.28%
Formula
Percentage change = [(102 - 649) / 649] x 100
Subtract the new number by the original number
102 - 649 = -547
-547 ÷ 649 = -0.8428351309707242
-0.8428351309707242 x 100 = -84.28%