-1.2% is the change from 664 to 656
Calculation steps:
[( 656 - 664 ) ÷ 664] x 100 = -1.2%
Formula
Percentage change = [(656 - 664) / 664] x 100
Subtract the new number by the original number
656 - 664 = -8
-8 ÷ 664 = -0.012048192771084338
-0.012048192771084338 x 100 = -1.2%