-36.65% is the change from 663 to 420
Calculation steps:
[( 420 - 663 ) ÷ 663] x 100 = -36.65%
Formula
Percentage change = [(420 - 663) / 663] x 100
Subtract the new number by the original number
420 - 663 = -243
-243 ÷ 663 = -0.3665158371040724
-0.3665158371040724 x 100 = -36.65%