-0.99% is the change from 507 to 502
Calculation steps:
[( 502 - 507 ) ÷ 507] x 100 = -0.99%
Formula
Percentage change = [(502 - 507) / 507] x 100
Subtract the new number by the original number
502 - 507 = -5
-5 ÷ 507 = -0.009861932938856016
-0.009861932938856016 x 100 = -0.99%