-68.83% is the change from 664 to 207
Calculation steps:
[( 207 - 664 ) ÷ 664] x 100 = -68.83%
Formula
Percentage change = [(207 - 664) / 664] x 100
Subtract the new number by the original number
207 - 664 = -457
-457 ÷ 664 = -0.6882530120481928
-0.6882530120481928 x 100 = -68.83%