-73.21% is the change from 780 to 209
Calculation steps:
[( 209 - 780 ) ÷ 780] x 100 = -73.21%
Formula
Percentage change = [(209 - 780) / 780] x 100
Subtract the new number by the original number
209 - 780 = -571
-571 ÷ 780 = -0.732051282051282
-0.732051282051282 x 100 = -73.21%