-39.43% is the change from 837 to 507
Calculation steps:
[( 507 - 837 ) ÷ 837] x 100 = -39.43%
Formula
Percentage change = [(507 - 837) / 837] x 100
Subtract the new number by the original number
507 - 837 = -330
-330 ÷ 837 = -0.3942652329749104
-0.3942652329749104 x 100 = -39.43%