-18.54% is the change from 669 to 545
Calculation steps:
[( 545 - 669 ) ÷ 669] x 100 = -18.54%
Formula
Percentage change = [(545 - 669) / 669] x 100
Subtract the new number by the original number
545 - 669 = -124
-124 ÷ 669 = -0.18535127055306427
-0.18535127055306427 x 100 = -18.54%