-73.1% is the change from 777 to 209
Calculation steps:
[( 209 - 777 ) ÷ 777] x 100 = -73.1%
Formula
Percentage change = [(209 - 777) / 777] x 100
Subtract the new number by the original number
209 - 777 = -568
-568 ÷ 777 = -0.731016731016731
-0.731016731016731 x 100 = -73.1%