-39.76% is the change from 679 to 409
Calculation steps:
[( 409 - 679 ) ÷ 679] x 100 = -39.76%
Formula
Percentage change = [(409 - 679) / 679] x 100
Subtract the new number by the original number
409 - 679 = -270
-270 ÷ 679 = -0.39764359351988215
-0.39764359351988215 x 100 = -39.76%