-78.13% is the change from 631 to 138
Calculation steps:
[( 138 - 631 ) ÷ 631] x 100 = -78.13%
Formula
Percentage change = [(138 - 631) / 631] x 100
Subtract the new number by the original number
138 - 631 = -493
-493 ÷ 631 = -0.7812995245641838
-0.7812995245641838 x 100 = -78.13%