-40.87% is the change from 663 to 392
Calculation steps:
[( 392 - 663 ) ÷ 663] x 100 = -40.87%
Formula
Percentage change = [(392 - 663) / 663] x 100
Subtract the new number by the original number
392 - 663 = -271
-271 ÷ 663 = -0.40874811463046756
-0.40874811463046756 x 100 = -40.87%