-17.36% is the change from 409 to 338
Calculation steps:
[( 338 - 409 ) ÷ 409] x 100 = -17.36%
Formula
Percentage change = [(338 - 409) / 409] x 100
Subtract the new number by the original number
338 - 409 = -71
-71 ÷ 409 = -0.17359413202933985
-0.17359413202933985 x 100 = -17.36%