-98.43% is the change from 635 to 10
Calculation steps:
[( 10 - 635 ) ÷ 635] x 100 = -98.43%
Formula
Percentage change = [(10 - 635) / 635] x 100
Subtract the new number by the original number
10 - 635 = -625
-625 ÷ 635 = -0.984251968503937
-0.984251968503937 x 100 = -98.43%