-35.6% is the change from 663 to 427
Calculation steps:
[( 427 - 663 ) ÷ 663] x 100 = -35.6%
Formula
Percentage change = [(427 - 663) / 663] x 100
Subtract the new number by the original number
427 - 663 = -236
-236 ÷ 663 = -0.3559577677224736
-0.3559577677224736 x 100 = -35.6%