-68.12% is the change from 665 to 212
Calculation steps:
[( 212 - 665 ) ÷ 665] x 100 = -68.12%
Formula
Percentage change = [(212 - 665) / 665] x 100
Subtract the new number by the original number
212 - 665 = -453
-453 ÷ 665 = -0.681203007518797
-0.681203007518797 x 100 = -68.12%