-34.49% is the change from 664 to 435
Calculation steps:
[( 435 - 664 ) ÷ 664] x 100 = -34.49%
Formula
Percentage change = [(435 - 664) / 664] x 100
Subtract the new number by the original number
435 - 664 = -229
-229 ÷ 664 = -0.34487951807228917
-0.34487951807228917 x 100 = -34.49%