-80.68% is the change from 409 to 79
Calculation steps:
[( 79 - 409 ) ÷ 409] x 100 = -80.68%
Formula
Percentage change = [(79 - 409) / 409] x 100
Subtract the new number by the original number
79 - 409 = -330
-330 ÷ 409 = -0.8068459657701712
-0.8068459657701712 x 100 = -80.68%