-0.15% is the change from 664 to 663
Calculation steps:
[( 663 - 664 ) ÷ 664] x 100 = -0.15%
Formula
Percentage change = [(663 - 664) / 664] x 100
Subtract the new number by the original number
663 - 664 = -1
-1 ÷ 664 = -0.0015060240963855422
-0.0015060240963855422 x 100 = -0.15%