230.68% is the change from 251 to 830
Calculation steps:
[( 830 - 251 ) ÷ 251] x 100 = 230.68%
Formula
Percentage change = [(830 - 251) / 251] x 100
Subtract the new number by the original number
830 - 251 = 579
579 ÷ 251 = 2.306772908366534
2.306772908366534 x 100 = 230.68%