-91.23% is the change from 479 to 42
Calculation steps:
[( 42 - 479 ) ÷ 479] x 100 = -91.23%
Formula
Percentage change = [(42 - 479) / 479] x 100
Subtract the new number by the original number
42 - 479 = -437
-437 ÷ 479 = -0.9123173277661796
-0.9123173277661796 x 100 = -91.23%