-17.85% is the change from 409 to 336
Calculation steps:
[( 336 - 409 ) ÷ 409] x 100 = -17.85%
Formula
Percentage change = [(336 - 409) / 409] x 100
Subtract the new number by the original number
336 - 409 = -73
-73 ÷ 409 = -0.1784841075794621
-0.1784841075794621 x 100 = -17.85%