2529.03% is the change from 31 to 815
Calculation steps:
[( 815 - 31 ) ÷ 31] x 100 = 2529.03%
Formula
Percentage change = [(815 - 31) / 31] x 100
Subtract the new number by the original number
815 - 31 = 784
784 ÷ 31 = 25.29032258064516
25.29032258064516 x 100 = 2529.03%