-12.56% is the change from 621 to 543
Calculation steps:
[( 543 - 621 ) ÷ 621] x 100 = -12.56%
Formula
Percentage change = [(543 - 621) / 621] x 100
Subtract the new number by the original number
543 - 621 = -78
-78 ÷ 621 = -0.12560386473429952
-0.12560386473429952 x 100 = -12.56%