-17.13% is the change from 613 to 508
Calculation steps:
[( 508 - 613 ) ÷ 613] x 100 = -17.13%
Formula
Percentage change = [(508 - 613) / 613] x 100
Subtract the new number by the original number
508 - 613 = -105
-105 ÷ 613 = -0.17128874388254486
-0.17128874388254486 x 100 = -17.13%