-0.6% is the change from 501 to 498
Calculation steps:
[( 498 - 501 ) ÷ 501] x 100 = -0.6%
Formula
Percentage change = [(498 - 501) / 501] x 100
Subtract the new number by the original number
498 - 501 = -3
-3 ÷ 501 = -0.005988023952095809
-0.005988023952095809 x 100 = -0.6%