-83.51% is the change from 479 to 79
Calculation steps:
[( 79 - 479 ) ÷ 479] x 100 = -83.51%
Formula
Percentage change = [(79 - 479) / 479] x 100
Subtract the new number by the original number
79 - 479 = -400
-400 ÷ 479 = -0.8350730688935282
-0.8350730688935282 x 100 = -83.51%