-63.8% is the change from 663 to 240
Calculation steps:
[( 240 - 663 ) ÷ 663] x 100 = -63.8%
Formula
Percentage change = [(240 - 663) / 663] x 100
Subtract the new number by the original number
240 - 663 = -423
-423 ÷ 663 = -0.6380090497737556
-0.6380090497737556 x 100 = -63.8%