-17.78% is the change from 613 to 504
Calculation steps:
[( 504 - 613 ) ÷ 613] x 100 = -17.78%
Formula
Percentage change = [(504 - 613) / 613] x 100
Subtract the new number by the original number
504 - 613 = -109
-109 ÷ 613 = -0.17781402936378465
-0.17781402936378465 x 100 = -17.78%