-33.81% is the change from 423 to 280
Calculation steps:
[( 280 - 423 ) ÷ 423] x 100 = -33.81%
Formula
Percentage change = [(280 - 423) / 423] x 100
Subtract the new number by the original number
280 - 423 = -143
-143 ÷ 423 = -0.3380614657210402
-0.3380614657210402 x 100 = -33.81%