-1.75% is the change from 285 to 280
Calculation steps:
[( 280 - 285 ) ÷ 285] x 100 = -1.75%
Formula
Percentage change = [(280 - 285) / 285] x 100
Subtract the new number by the original number
280 - 285 = -5
-5 ÷ 285 = -0.017543859649122806
-0.017543859649122806 x 100 = -1.75%