-75.3% is the change from 664 to 164
Calculation steps:
[( 164 - 664 ) ÷ 664] x 100 = -75.3%
Formula
Percentage change = [(164 - 664) / 664] x 100
Subtract the new number by the original number
164 - 664 = -500
-500 ÷ 664 = -0.7530120481927711
-0.7530120481927711 x 100 = -75.3%