-67.17% is the change from 664 to 218
Calculation steps:
[( 218 - 664 ) ÷ 664] x 100 = -67.17%
Formula
Percentage change = [(218 - 664) / 664] x 100
Subtract the new number by the original number
218 - 664 = -446
-446 ÷ 664 = -0.6716867469879518
-0.6716867469879518 x 100 = -67.17%