-24.21% is the change from 409 to 310
Calculation steps:
[( 310 - 409 ) ÷ 409] x 100 = -24.21%
Formula
Percentage change = [(310 - 409) / 409] x 100
Subtract the new number by the original number
310 - 409 = -99
-99 ÷ 409 = -0.24205378973105135
-0.24205378973105135 x 100 = -24.21%