-68.41% is the change from 671 to 212
Calculation steps:
[( 212 - 671 ) ÷ 671] x 100 = -68.41%
Formula
Percentage change = [(212 - 671) / 671] x 100
Subtract the new number by the original number
212 - 671 = -459
-459 ÷ 671 = -0.684053651266766
-0.684053651266766 x 100 = -68.41%