-98.46% is the change from 649 to 10
Calculation steps:
[( 10 - 649 ) ÷ 649] x 100 = -98.46%
Formula
Percentage change = [(10 - 649) / 649] x 100
Subtract the new number by the original number
10 - 649 = -639
-639 ÷ 649 = -0.9845916795069337
-0.9845916795069337 x 100 = -98.46%