-26.5% is the change from 551 to 405
Calculation steps:
[( 405 - 551 ) ÷ 551] x 100 = -26.5%
Formula
Percentage change = [(405 - 551) / 551] x 100
Subtract the new number by the original number
405 - 551 = -146
-146 ÷ 551 = -0.26497277676951
-0.26497277676951 x 100 = -26.5%