-39.12% is the change from 409 to 249
Calculation steps:
[( 249 - 409 ) ÷ 409] x 100 = -39.12%
Formula
Percentage change = [(249 - 409) / 409] x 100
Subtract the new number by the original number
249 - 409 = -160
-160 ÷ 409 = -0.39119804400978
-0.39119804400978 x 100 = -39.12%