-89.52% is the change from 668 to 70
Calculation steps:
[( 70 - 668 ) ÷ 668] x 100 = -89.52%
Formula
Percentage change = [(70 - 668) / 668] x 100
Subtract the new number by the original number
70 - 668 = -598
-598 ÷ 668 = -0.8952095808383234
-0.8952095808383234 x 100 = -89.52%