-31.91% is the change from 423 to 288
Calculation steps:
[( 288 - 423 ) ÷ 423] x 100 = -31.91%
Formula
Percentage change = [(288 - 423) / 423] x 100
Subtract the new number by the original number
288 - 423 = -135
-135 ÷ 423 = -0.3191489361702128
-0.3191489361702128 x 100 = -31.91%