-2.86% is the change from 525 to 510
Calculation steps:
[( 510 - 525 ) ÷ 525] x 100 = -2.86%
Formula
Percentage change = [(510 - 525) / 525] x 100
Subtract the new number by the original number
510 - 525 = -15
-15 ÷ 525 = -0.02857142857142857
-0.02857142857142857 x 100 = -2.86%