-9.45% is the change from 328 to 297
Calculation steps:
[( 297 - 328 ) ÷ 328] x 100 = -9.45%
Formula
Percentage change = [(297 - 328) / 328] x 100
Subtract the new number by the original number
297 - 328 = -31
-31 ÷ 328 = -0.09451219512195122
-0.09451219512195122 x 100 = -9.45%