-4.02% is the change from 523 to 502
Calculation steps:
[( 502 - 523 ) ÷ 523] x 100 = -4.02%
Formula
Percentage change = [(502 - 523) / 523] x 100
Subtract the new number by the original number
502 - 523 = -21
-21 ÷ 523 = -0.040152963671128104
-0.040152963671128104 x 100 = -4.02%