-29.22% is the change from 551 to 390
Calculation steps:
[( 390 - 551 ) ÷ 551] x 100 = -29.22%
Formula
Percentage change = [(390 - 551) / 551] x 100
Subtract the new number by the original number
390 - 551 = -161
-161 ÷ 551 = -0.29219600725952816
-0.29219600725952816 x 100 = -29.22%