-99.21% is the change from 635 to 5
Calculation steps:
[( 5 - 635 ) ÷ 635] x 100 = -99.21%
Formula
Percentage change = [(5 - 635) / 635] x 100
Subtract the new number by the original number
5 - 635 = -630
-630 ÷ 635 = -0.9921259842519685
-0.9921259842519685 x 100 = -99.21%