-84.9% is the change from 649 to 98
Calculation steps:
[( 98 - 649 ) ÷ 649] x 100 = -84.9%
Formula
Percentage change = [(98 - 649) / 649] x 100
Subtract the new number by the original number
98 - 649 = -551
-551 ÷ 649 = -0.8489984591679507
-0.8489984591679507 x 100 = -84.9%