-26.79% is the change from 545 to 399
Calculation steps:
[( 399 - 545 ) ÷ 545] x 100 = -26.79%
Formula
Percentage change = [(399 - 545) / 545] x 100
Subtract the new number by the original number
399 - 545 = -146
-146 ÷ 545 = -0.26788990825688075
-0.26788990825688075 x 100 = -26.79%