-13.43% is the change from 581 to 503
Calculation steps:
[( 503 - 581 ) ÷ 581] x 100 = -13.43%
Formula
Percentage change = [(503 - 581) / 581] x 100
Subtract the new number by the original number
503 - 581 = -78
-78 ÷ 581 = -0.1342512908777969
-0.1342512908777969 x 100 = -13.43%