-12.8% is the change from 328 to 286
Calculation steps:
[( 286 - 328 ) ÷ 328] x 100 = -12.8%
Formula
Percentage change = [(286 - 328) / 328] x 100
Subtract the new number by the original number
286 - 328 = -42
-42 ÷ 328 = -0.12804878048780488
-0.12804878048780488 x 100 = -12.8%