-97.38% is the change from 648 to 17
Calculation steps:
[( 17 - 648 ) ÷ 648] x 100 = -97.38%
Formula
Percentage change = [(17 - 648) / 648] x 100
Subtract the new number by the original number
17 - 648 = -631
-631 ÷ 648 = -0.9737654320987654
-0.9737654320987654 x 100 = -97.38%