-2.72% is the change from 515 to 501
Calculation steps:
[( 501 - 515 ) ÷ 515] x 100 = -2.72%
Formula
Percentage change = [(501 - 515) / 515] x 100
Subtract the new number by the original number
501 - 515 = -14
-14 ÷ 515 = -0.027184466019417475
-0.027184466019417475 x 100 = -2.72%