-97.53% is the change from 607 to 15
Calculation steps:
[( 15 - 607 ) ÷ 607] x 100 = -97.53%
Formula
Percentage change = [(15 - 607) / 607] x 100
Subtract the new number by the original number
15 - 607 = -592
-592 ÷ 607 = -0.9752883031301482
-0.9752883031301482 x 100 = -97.53%