-97.38% is the change from 649 to 17
Calculation steps:
[( 17 - 649 ) ÷ 649] x 100 = -97.38%
Formula
Percentage change = [(17 - 649) / 649] x 100
Subtract the new number by the original number
17 - 649 = -632
-632 ÷ 649 = -0.9738058551617874
-0.9738058551617874 x 100 = -97.38%