-28.75% is the change from 393 to 280
Calculation steps:
[( 280 - 393 ) ÷ 393] x 100 = -28.75%
Formula
Percentage change = [(280 - 393) / 393] x 100
Subtract the new number by the original number
280 - 393 = -113
-113 ÷ 393 = -0.2875318066157761
-0.2875318066157761 x 100 = -28.75%