-7.57% is the change from 423 to 391
Calculation steps:
[( 391 - 423 ) ÷ 423] x 100 = -7.57%
Formula
Percentage change = [(391 - 423) / 423] x 100
Subtract the new number by the original number
391 - 423 = -32
-32 ÷ 423 = -0.07565011820330969
-0.07565011820330969 x 100 = -7.57%