-0.2% is the change from 508 to 507
Calculation steps:
[( 507 - 508 ) ÷ 508] x 100 = -0.2%
Formula
Percentage change = [(507 - 508) / 508] x 100
Subtract the new number by the original number
507 - 508 = -1
-1 ÷ 508 = -0.001968503937007874
-0.001968503937007874 x 100 = -0.2%