819.35% is the change from 31 to 285
Calculation steps:
[( 285 - 31 ) ÷ 31] x 100 = 819.35%
Formula
Percentage change = [(285 - 31) / 31] x 100
Subtract the new number by the original number
285 - 31 = 254
254 ÷ 31 = 8.193548387096774
8.193548387096774 x 100 = 819.35%