-3.48% is the change from 517 to 499
Calculation steps:
[( 499 - 517 ) ÷ 517] x 100 = -3.48%
Formula
Percentage change = [(499 - 517) / 517] x 100
Subtract the new number by the original number
499 - 517 = -18
-18 ÷ 517 = -0.03481624758220503
-0.03481624758220503 x 100 = -3.48%