-39.07% is the change from 837 to 510
Calculation steps:
[( 510 - 837 ) ÷ 837] x 100 = -39.07%
Formula
Percentage change = [(510 - 837) / 837] x 100
Subtract the new number by the original number
510 - 837 = -327
-327 ÷ 837 = -0.3906810035842294
-0.3906810035842294 x 100 = -39.07%