-27.59% is the change from 551 to 399
Calculation steps:
[( 399 - 551 ) ÷ 551] x 100 = -27.59%
Formula
Percentage change = [(399 - 551) / 551] x 100
Subtract the new number by the original number
399 - 551 = -152
-152 ÷ 551 = -0.27586206896551724
-0.27586206896551724 x 100 = -27.59%