-2.41% is the change from 663 to 647
Calculation steps:
[( 647 - 663 ) ÷ 663] x 100 = -2.41%
Formula
Percentage change = [(647 - 663) / 663] x 100
Subtract the new number by the original number
647 - 663 = -16
-16 ÷ 663 = -0.024132730015082957
-0.024132730015082957 x 100 = -2.41%