-23.23% is the change from 551 to 423
Calculation steps:
[( 423 - 551 ) ÷ 551] x 100 = -23.23%
Formula
Percentage change = [(423 - 551) / 551] x 100
Subtract the new number by the original number
423 - 551 = -128
-128 ÷ 551 = -0.2323049001814882
-0.2323049001814882 x 100 = -23.23%