-84.04% is the change from 664 to 106
Calculation steps:
[( 106 - 664 ) ÷ 664] x 100 = -84.04%
Formula
Percentage change = [(106 - 664) / 664] x 100
Subtract the new number by the original number
106 - 664 = -558
-558 ÷ 664 = -0.8403614457831325
-0.8403614457831325 x 100 = -84.04%