-1.09% is the change from 551 to 545
Calculation steps:
[( 545 - 551 ) ÷ 551] x 100 = -1.09%
Formula
Percentage change = [(545 - 551) / 551] x 100
Subtract the new number by the original number
545 - 551 = -6
-6 ÷ 551 = -0.010889292196007259
-0.010889292196007259 x 100 = -1.09%