-97.9% is the change from 668 to 14
Calculation steps:
[( 14 - 668 ) ÷ 668] x 100 = -97.9%
Formula
Percentage change = [(14 - 668) / 668] x 100
Subtract the new number by the original number
14 - 668 = -654
-654 ÷ 668 = -0.9790419161676647
-0.9790419161676647 x 100 = -97.9%