-63.78% is the change from 773 to 280
Calculation steps:
[( 280 - 773 ) ÷ 773] x 100 = -63.78%
Formula
Percentage change = [(280 - 773) / 773] x 100
Subtract the new number by the original number
280 - 773 = -493
-493 ÷ 773 = -0.6377749029754204
-0.6377749029754204 x 100 = -63.78%