-89.79% is the change from 480 to 49
Calculation steps:
[( 49 - 480 ) ÷ 480] x 100 = -89.79%
Formula
Percentage change = [(49 - 480) / 480] x 100
Subtract the new number by the original number
49 - 480 = -431
-431 ÷ 480 = -0.8979166666666667
-0.8979166666666667 x 100 = -89.79%