3122.58% is the change from 31 to 999
Calculation steps:
[( 999 - 31 ) ÷ 31] x 100 = 3122.58%
Formula
Percentage change = [(999 - 31) / 31] x 100
Subtract the new number by the original number
999 - 31 = 968
968 ÷ 31 = 31.225806451612904
31.225806451612904 x 100 = 3122.58%