-40.62% is the change from 837 to 497
Calculation steps:
[( 497 - 837 ) ÷ 837] x 100 = -40.62%
Formula
Percentage change = [(497 - 837) / 837] x 100
Subtract the new number by the original number
497 - 837 = -340
-340 ÷ 837 = -0.4062126642771804
-0.4062126642771804 x 100 = -40.62%