-64.61% is the change from 664 to 235
Calculation steps:
[( 235 - 664 ) ÷ 664] x 100 = -64.61%
Formula
Percentage change = [(235 - 664) / 664] x 100
Subtract the new number by the original number
235 - 664 = -429
-429 ÷ 664 = -0.6460843373493976
-0.6460843373493976 x 100 = -64.61%