-3.09% is the change from 517 to 501
Calculation steps:
[( 501 - 517 ) ÷ 517] x 100 = -3.09%
Formula
Percentage change = [(501 - 517) / 517] x 100
Subtract the new number by the original number
501 - 517 = -16
-16 ÷ 517 = -0.030947775628626693
-0.030947775628626693 x 100 = -3.09%