-2.13% is the change from 517 to 506
Calculation steps:
[( 506 - 517 ) ÷ 517] x 100 = -2.13%
Formula
Percentage change = [(506 - 517) / 517] x 100
Subtract the new number by the original number
506 - 517 = -11
-11 ÷ 517 = -0.02127659574468085
-0.02127659574468085 x 100 = -2.13%