-98.1% is the change from 631 to 12
Calculation steps:
[( 12 - 631 ) ÷ 631] x 100 = -98.1%
Formula
Percentage change = [(12 - 631) / 631] x 100
Subtract the new number by the original number
12 - 631 = -619
-619 ÷ 631 = -0.9809825673534073
-0.9809825673534073 x 100 = -98.1%