-49.55% is the change from 664 to 335
Calculation steps:
[( 335 - 664 ) ÷ 664] x 100 = -49.55%
Formula
Percentage change = [(335 - 664) / 664] x 100
Subtract the new number by the original number
335 - 664 = -329
-329 ÷ 664 = -0.4954819277108434
-0.4954819277108434 x 100 = -49.55%