-97.52% is the change from 644 to 16
Calculation steps:
[( 16 - 644 ) ÷ 644] x 100 = -97.52%
Formula
Percentage change = [(16 - 644) / 644] x 100
Subtract the new number by the original number
16 - 644 = -628
-628 ÷ 644 = -0.9751552795031055
-0.9751552795031055 x 100 = -97.52%