-18.83% is the change from 669 to 543
Calculation steps:
[( 543 - 669 ) ÷ 669] x 100 = -18.83%
Formula
Percentage change = [(543 - 669) / 669] x 100
Subtract the new number by the original number
543 - 669 = -126
-126 ÷ 669 = -0.18834080717488788
-0.18834080717488788 x 100 = -18.83%