-95.22% is the change from 837 to 40
Calculation steps:
[( 40 - 837 ) ÷ 837] x 100 = -95.22%
Formula
Percentage change = [(40 - 837) / 837] x 100
Subtract the new number by the original number
40 - 837 = -797
-797 ÷ 837 = -0.9522102747909199
-0.9522102747909199 x 100 = -95.22%