-3.96% is the change from 328 to 315
Calculation steps:
[( 315 - 328 ) ÷ 328] x 100 = -3.96%
Formula
Percentage change = [(315 - 328) / 328] x 100
Subtract the new number by the original number
315 - 328 = -13
-13 ÷ 328 = -0.039634146341463415
-0.039634146341463415 x 100 = -3.96%