-17.67% is the change from 617 to 508
Calculation steps:
[( 508 - 617 ) ÷ 617] x 100 = -17.67%
Formula
Percentage change = [(508 - 617) / 617] x 100
Subtract the new number by the original number
508 - 617 = -109
-109 ÷ 617 = -0.1766612641815235
-0.1766612641815235 x 100 = -17.67%