-31.48% is the change from 664 to 455
Calculation steps:
[( 455 - 664 ) ÷ 664] x 100 = -31.48%
Formula
Percentage change = [(455 - 664) / 664] x 100
Subtract the new number by the original number
455 - 664 = -209
-209 ÷ 664 = -0.3147590361445783
-0.3147590361445783 x 100 = -31.48%