-83.89% is the change from 664 to 107
Calculation steps:
[( 107 - 664 ) ÷ 664] x 100 = -83.89%
Formula
Percentage change = [(107 - 664) / 664] x 100
Subtract the new number by the original number
107 - 664 = -557
-557 ÷ 664 = -0.838855421686747
-0.838855421686747 x 100 = -83.89%