-89.6% is the change from 673 to 70
Calculation steps:
[( 70 - 673 ) ÷ 673] x 100 = -89.6%
Formula
Percentage change = [(70 - 673) / 673] x 100
Subtract the new number by the original number
70 - 673 = -603
-603 ÷ 673 = -0.8959881129271917
-0.8959881129271917 x 100 = -89.6%