-4.51% is the change from 510 to 487
Calculation steps:
[( 487 - 510 ) ÷ 510] x 100 = -4.51%
Formula
Percentage change = [(487 - 510) / 510] x 100
Subtract the new number by the original number
487 - 510 = -23
-23 ÷ 510 = -0.045098039215686274
-0.045098039215686274 x 100 = -4.51%