-97.8% is the change from 635 to 14
Calculation steps:
[( 14 - 635 ) ÷ 635] x 100 = -97.8%
Formula
Percentage change = [(14 - 635) / 635] x 100
Subtract the new number by the original number
14 - 635 = -621
-621 ÷ 635 = -0.9779527559055118
-0.9779527559055118 x 100 = -97.8%