224.7% is the change from 251 to 815
Calculation steps:
[( 815 - 251 ) ÷ 251] x 100 = 224.7%
Formula
Percentage change = [(815 - 251) / 251] x 100
Subtract the new number by the original number
815 - 251 = 564
564 ÷ 251 = 2.247011952191235
2.247011952191235 x 100 = 224.7%