-12.68% is the change from 631 to 551
Calculation steps:
[( 551 - 631 ) ÷ 631] x 100 = -12.68%
Formula
Percentage change = [(551 - 631) / 631] x 100
Subtract the new number by the original number
551 - 631 = -80
-80 ÷ 631 = -0.12678288431061807
-0.12678288431061807 x 100 = -12.68%