-31.78% is the change from 409 to 279
Calculation steps:
[( 279 - 409 ) ÷ 409] x 100 = -31.78%
Formula
Percentage change = [(279 - 409) / 409] x 100
Subtract the new number by the original number
279 - 409 = -130
-130 ÷ 409 = -0.31784841075794623
-0.31784841075794623 x 100 = -31.78%