-97.89% is the change from 617 to 13
Calculation steps:
[( 13 - 617 ) ÷ 617] x 100 = -97.89%
Formula
Percentage change = [(13 - 617) / 617] x 100
Subtract the new number by the original number
13 - 617 = -604
-604 ÷ 617 = -0.9789303079416531
-0.9789303079416531 x 100 = -97.89%