-68.48% is the change from 663 to 209
Calculation steps:
[( 209 - 663 ) ÷ 663] x 100 = -68.48%
Formula
Percentage change = [(209 - 663) / 663] x 100
Subtract the new number by the original number
209 - 663 = -454
-454 ÷ 663 = -0.6847662141779789
-0.6847662141779789 x 100 = -68.48%