-28.64% is the change from 398 to 284
Calculation steps:
[( 284 - 398 ) ÷ 398] x 100 = -28.64%
Formula
Percentage change = [(284 - 398) / 398] x 100
Subtract the new number by the original number
284 - 398 = -114
-114 ÷ 398 = -0.2864321608040201
-0.2864321608040201 x 100 = -28.64%