-18.7% is the change from 663 to 539
Calculation steps:
[( 539 - 663 ) ÷ 663] x 100 = -18.7%
Formula
Percentage change = [(539 - 663) / 663] x 100
Subtract the new number by the original number
539 - 663 = -124
-124 ÷ 663 = -0.1870286576168929
-0.1870286576168929 x 100 = -18.7%