-90.1% is the change from 485 to 48
Calculation steps:
[( 48 - 485 ) ÷ 485] x 100 = -90.1%
Formula
Percentage change = [(48 - 485) / 485] x 100
Subtract the new number by the original number
48 - 485 = -437
-437 ÷ 485 = -0.9010309278350516
-0.9010309278350516 x 100 = -90.1%