-80.54% is the change from 663 to 129
Calculation steps:
[( 129 - 663 ) ÷ 663] x 100 = -80.54%
Formula
Percentage change = [(129 - 663) / 663] x 100
Subtract the new number by the original number
129 - 663 = -534
-534 ÷ 663 = -0.8054298642533937
-0.8054298642533937 x 100 = -80.54%