-7.78% is the change from 591 to 545
Calculation steps:
[( 545 - 591 ) ÷ 591] x 100 = -7.78%
Formula
Percentage change = [(545 - 591) / 591] x 100
Subtract the new number by the original number
545 - 591 = -46
-46 ÷ 591 = -0.077834179357022
-0.077834179357022 x 100 = -7.78%