-1.36% is the change from 664 to 655
Calculation steps:
[( 655 - 664 ) ÷ 664] x 100 = -1.36%
Formula
Percentage change = [(655 - 664) / 664] x 100
Subtract the new number by the original number
655 - 664 = -9
-9 ÷ 664 = -0.01355421686746988
-0.01355421686746988 x 100 = -1.36%