-95.28% is the change from 635 to 30
Calculation steps:
[( 30 - 635 ) ÷ 635] x 100 = -95.28%
Formula
Percentage change = [(30 - 635) / 635] x 100
Subtract the new number by the original number
30 - 635 = -605
-605 ÷ 635 = -0.952755905511811
-0.952755905511811 x 100 = -95.28%