-7.71% is the change from 350 to 323
Calculation steps:
[( 323 - 350 ) ÷ 350] x 100 = -7.71%
Formula
Percentage change = [(323 - 350) / 350] x 100
Subtract the new number by the original number
323 - 350 = -27
-27 ÷ 350 = -0.07714285714285714
-0.07714285714285714 x 100 = -7.71%