-5.26% is the change from 323 to 306
Calculation steps:
[( 306 - 323 ) ÷ 323] x 100 = -5.26%
Formula
Percentage change = [(306 - 323) / 323] x 100
Subtract the new number by the original number
306 - 323 = -17
-17 ÷ 323 = -0.05263157894736842
-0.05263157894736842 x 100 = -5.26%