-3.29% is the change from 517 to 500
Calculation steps:
[( 500 - 517 ) ÷ 517] x 100 = -3.29%
Formula
Percentage change = [(500 - 517) / 517] x 100
Subtract the new number by the original number
500 - 517 = -17
-17 ÷ 517 = -0.03288201160541586
-0.03288201160541586 x 100 = -3.29%