-97.89% is the change from 664 to 14
Calculation steps:
[( 14 - 664 ) ÷ 664] x 100 = -97.89%
Formula
Percentage change = [(14 - 664) / 664] x 100
Subtract the new number by the original number
14 - 664 = -650
-650 ÷ 664 = -0.9789156626506024
-0.9789156626506024 x 100 = -97.89%