-62.13% is the change from 837 to 317
Calculation steps:
[( 317 - 837 ) ÷ 837] x 100 = -62.13%
Formula
Percentage change = [(317 - 837) / 837] x 100
Subtract the new number by the original number
317 - 837 = -520
-520 ÷ 837 = -0.6212664277180406
-0.6212664277180406 x 100 = -62.13%