-16.07% is the change from 280 to 235
Calculation steps:
[( 235 - 280 ) ÷ 280] x 100 = -16.07%
Formula
Percentage change = [(235 - 280) / 280] x 100
Subtract the new number by the original number
235 - 280 = -45
-45 ÷ 280 = -0.16071428571428573
-0.16071428571428573 x 100 = -16.07%