-1.78% is the change from 507 to 498
Calculation steps:
[( 498 - 507 ) ÷ 507] x 100 = -1.78%
Formula
Percentage change = [(498 - 507) / 507] x 100
Subtract the new number by the original number
498 - 507 = -9
-9 ÷ 507 = -0.01775147928994083
-0.01775147928994083 x 100 = -1.78%