2577.42% is the change from 31 to 830
Calculation steps:
[( 830 - 31 ) ÷ 31] x 100 = 2577.42%
Formula
Percentage change = [(830 - 31) / 31] x 100
Subtract the new number by the original number
830 - 31 = 799
799 ÷ 31 = 25.774193548387096
25.774193548387096 x 100 = 2577.42%