-49.1% is the change from 996 to 507
Calculation steps:
[( 507 - 996 ) ÷ 996] x 100 = -49.1%
Formula
Percentage change = [(507 - 996) / 996] x 100
Subtract the new number by the original number
507 - 996 = -489
-489 ÷ 996 = -0.49096385542168675
-0.49096385542168675 x 100 = -49.1%