-97.08% is the change from 617 to 18
Calculation steps:
[( 18 - 617 ) ÷ 617] x 100 = -97.08%
Formula
Percentage change = [(18 - 617) / 617] x 100
Subtract the new number by the original number
18 - 617 = -599
-599 ÷ 617 = -0.9708265802269044
-0.9708265802269044 x 100 = -97.08%