-99.22% is the change from 637 to 5
Calculation steps:
[( 5 - 637 ) ÷ 637] x 100 = -99.22%
Formula
Percentage change = [(5 - 637) / 637] x 100
Subtract the new number by the original number
5 - 637 = -632
-632 ÷ 637 = -0.9921507064364207
-0.9921507064364207 x 100 = -99.22%