-35.03% is the change from 431 to 280
Calculation steps:
[( 280 - 431 ) ÷ 431] x 100 = -35.03%
Formula
Percentage change = [(280 - 431) / 431] x 100
Subtract the new number by the original number
280 - 431 = -151
-151 ÷ 431 = -0.3503480278422274
-0.3503480278422274 x 100 = -35.03%