-79.03% is the change from 663 to 139
Calculation steps:
[( 139 - 663 ) ÷ 663] x 100 = -79.03%
Formula
Percentage change = [(139 - 663) / 663] x 100
Subtract the new number by the original number
139 - 663 = -524
-524 ÷ 663 = -0.7903469079939668
-0.7903469079939668 x 100 = -79.03%