-40.21% is the change from 664 to 397
Calculation steps:
[( 397 - 664 ) ÷ 664] x 100 = -40.21%
Formula
Percentage change = [(397 - 664) / 664] x 100
Subtract the new number by the original number
397 - 664 = -267
-267 ÷ 664 = -0.40210843373493976
-0.40210843373493976 x 100 = -40.21%