-98.54% is the change from 617 to 9
Calculation steps:
[( 9 - 617 ) ÷ 617] x 100 = -98.54%
Formula
Percentage change = [(9 - 617) / 617] x 100
Subtract the new number by the original number
9 - 617 = -608
-608 ÷ 617 = -0.9854132901134521
-0.9854132901134521 x 100 = -98.54%