-68.22% is the change from 664 to 211
Calculation steps:
[( 211 - 664 ) ÷ 664] x 100 = -68.22%
Formula
Percentage change = [(211 - 664) / 664] x 100
Subtract the new number by the original number
211 - 664 = -453
-453 ÷ 664 = -0.6822289156626506
-0.6822289156626506 x 100 = -68.22%