-17.02% is the change from 617 to 512
Calculation steps:
[( 512 - 617 ) ÷ 617] x 100 = -17.02%
Formula
Percentage change = [(512 - 617) / 617] x 100
Subtract the new number by the original number
512 - 617 = -105
-105 ÷ 617 = -0.17017828200972449
-0.17017828200972449 x 100 = -17.02%