-3.35% is the change from 507 to 490
Calculation steps:
[( 490 - 507 ) ÷ 507] x 100 = -3.35%
Formula
Percentage change = [(490 - 507) / 507] x 100
Subtract the new number by the original number
490 - 507 = -17
-17 ÷ 507 = -0.03353057199211045
-0.03353057199211045 x 100 = -3.35%