-27.37% is the change from 391 to 284
Calculation steps:
[( 284 - 391 ) ÷ 391] x 100 = -27.37%
Formula
Percentage change = [(284 - 391) / 391] x 100
Subtract the new number by the original number
284 - 391 = -107
-107 ÷ 391 = -0.27365728900255754
-0.27365728900255754 x 100 = -27.37%