-62.37% is the change from 837 to 315
Calculation steps:
[( 315 - 837 ) ÷ 837] x 100 = -62.37%
Formula
Percentage change = [(315 - 837) / 837] x 100
Subtract the new number by the original number
315 - 837 = -522
-522 ÷ 837 = -0.6236559139784946
-0.6236559139784946 x 100 = -62.37%