-24.45% is the change from 409 to 309
Calculation steps:
[( 309 - 409 ) ÷ 409] x 100 = -24.45%
Formula
Percentage change = [(309 - 409) / 409] x 100
Subtract the new number by the original number
309 - 409 = -100
-100 ÷ 409 = -0.24449877750611246
-0.24449877750611246 x 100 = -24.45%