-97.52% is the change from 606 to 15
Calculation steps:
[( 15 - 606 ) ÷ 606] x 100 = -97.52%
Formula
Percentage change = [(15 - 606) / 606] x 100
Subtract the new number by the original number
15 - 606 = -591
-591 ÷ 606 = -0.9752475247524752
-0.9752475247524752 x 100 = -97.52%