-70.66% is the change from 668 to 196
Calculation steps:
[( 196 - 668 ) ÷ 668] x 100 = -70.66%
Formula
Percentage change = [(196 - 668) / 668] x 100
Subtract the new number by the original number
196 - 668 = -472
-472 ÷ 668 = -0.7065868263473054
-0.7065868263473054 x 100 = -70.66%