49850% is the change from 2 to 999
Calculation steps:
[( 999 - 2 ) ÷ 2] x 100 = 49850%
Formula
Percentage change = [(999 - 2) / 2] x 100
Subtract the new number by the original number
999 - 2 = 997
997 ÷ 2 = 498.5
498.5 x 100 = 49850%
Example