-79.12% is the change from 479 to 100
Calculation steps:
[( 100 - 479 ) ÷ 479] x 100 = -79.12%
Formula
Percentage change = [(100 - 479) / 479] x 100
Subtract the new number by the original number
100 - 479 = -379
-379 ÷ 479 = -0.791231732776618
-0.791231732776618 x 100 = -79.12%