-2.79% is the change from 501 to 487
Calculation steps:
[( 487 - 501 ) ÷ 501] x 100 = -2.79%
Formula
Percentage change = [(487 - 501) / 501] x 100
Subtract the new number by the original number
487 - 501 = -14
-14 ÷ 501 = -0.027944111776447105
-0.027944111776447105 x 100 = -2.79%