-6.9% is the change from 551 to 513
Calculation steps:
[( 513 - 551 ) ÷ 551] x 100 = -6.9%
Formula
Percentage change = [(513 - 551) / 551] x 100
Subtract the new number by the original number
513 - 551 = -38
-38 ÷ 551 = -0.06896551724137931
-0.06896551724137931 x 100 = -6.9%