-74.7% is the change from 664 to 168
Calculation steps:
[( 168 - 664 ) ÷ 664] x 100 = -74.7%
Formula
Percentage change = [(168 - 664) / 664] x 100
Subtract the new number by the original number
168 - 664 = -496
-496 ÷ 664 = -0.7469879518072289
-0.7469879518072289 x 100 = -74.7%