-85.05% is the change from 649 to 97
Calculation steps:
[( 97 - 649 ) ÷ 649] x 100 = -85.05%
Formula
Percentage change = [(97 - 649) / 649] x 100
Subtract the new number by the original number
97 - 649 = -552
-552 ÷ 649 = -0.8505392912172574
-0.8505392912172574 x 100 = -85.05%