-85.54% is the change from 664 to 96
Calculation steps:
[( 96 - 664 ) ÷ 664] x 100 = -85.54%
Formula
Percentage change = [(96 - 664) / 664] x 100
Subtract the new number by the original number
96 - 664 = -568
-568 ÷ 664 = -0.8554216867469879
-0.8554216867469879 x 100 = -85.54%