-81.9% is the change from 663 to 120
Calculation steps:
[( 120 - 663 ) ÷ 663] x 100 = -81.9%
Formula
Percentage change = [(120 - 663) / 663] x 100
Subtract the new number by the original number
120 - 663 = -543
-543 ÷ 663 = -0.8190045248868778
-0.8190045248868778 x 100 = -81.9%