-17.94% is the change from 613 to 503
Calculation steps:
[( 503 - 613 ) ÷ 613] x 100 = -17.94%
Formula
Percentage change = [(503 - 613) / 613] x 100
Subtract the new number by the original number
503 - 613 = -110
-110 ÷ 613 = -0.17944535073409462
-0.17944535073409462 x 100 = -17.94%