-6.24% is the change from 545 to 511
Calculation steps:
[( 511 - 545 ) ÷ 545] x 100 = -6.24%
Formula
Percentage change = [(511 - 545) / 545] x 100
Subtract the new number by the original number
511 - 545 = -34
-34 ÷ 545 = -0.062385321100917435
-0.062385321100917435 x 100 = -6.24%